diff --git a/Gemfile.lock b/Gemfile.lock
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -126,8 +126,6 @@
       thor (>= 0.14, < 2.0)
     jquery-tablesorter (1.26.1)
       railties (>= 3.2, < 6)
-    jquery-timepicker-addon-rails (1.4.1)
-      railties (>= 3.1)
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
     listen (3.1.5)
@@ -285,7 +283,6 @@
   jquery-countdown-rails
   jquery-rails
   jquery-tablesorter
-  jquery-timepicker-addon-rails
   jquery-ui-rails
   listen (>= 3.0.5, < 3.2)
   mail
diff --git a/app/controllers/main_controller.rb b/app/controllers/main_controller.rb
--- a/app/controllers/main_controller.rb
+++ b/app/controllers/main_controller.rb
@@ -73,7 +73,7 @@
     @submission.submitted_at = Time.new.gmtime
     @submission.ip_address = request.remote_ip
 
-    if GraderConfiguration.time_limit_mode? and user.contest_finished?
+    if @current_user.admin? == false && GraderConfiguration.time_limit_mode? && @current_user.contest_finished?
       @submission.errors.add(:base,"The contest is over.")
       prepare_list_information
       render :action => 'list' and return
diff --git a/app/controllers/report_controller.rb b/app/controllers/report_controller.rb
--- a/app/controllers/report_controller.rb
+++ b/app/controllers/report_controller.rb
@@ -19,7 +19,7 @@
 
   def current_score
     @problems = Problem.available_problems
-    if params[:group_id]
+    if params[:group_id] && params[:users] == 'group'
       @group = Group.find(params[:group_id])
       @users = @group.users.where(enabled: true)
     else
@@ -50,10 +50,12 @@
     end
 
     #users
-    @users = if params[:users] == "all" then 
+    @users = if params[:users] == "group" then 
+               Group.find(params[:group_id]).users.all
+             elsif params[:users] == 'enabled'
+               User.includes(:contests).includes(:contest_stat).where(enabled: true)
+             else
                User.includes(:contests).includes(:contest_stat)
-             else 
-               User.includes(:contests).includes(:contest_stat).where(enabled: true)
              end
 
     #set up range from param
diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -95,7 +95,7 @@
   def submission_authorization
     #admin always has privileged
     return true if @current_user.admin?
-    return true if @current_user.has_role?('TA') && (['show','download'].include? action_name)
+    return true if @current_user.has_role?('ta') && (['show','download'].include? action_name)
 
     sub = Submission.find(params[:id])
     if @current_user.available_problems.include? sub.problem
diff --git a/app/views/report/current_score.html.haml b/app/views/report/current_score.html.haml
--- a/app/views/report/current_score.html.haml
+++ b/app/views/report/current_score.html.haml
@@ -1,11 +1,15 @@
 .container-fluid
   %h1 Current Score
   = form_tag current_score_report_path, method: 'get' do
-    Show only users from this group
+    .radio-inline
+      = radio_button_tag 'users', 'all', (params[:users] == 'all')
+      = label_tag(:users_all,'Show all users')
+    %br
+    .radio-inline
+      = radio_button_tag 'users', 'group', (params[:users] == 'group')
+      = label_tag(:users_group, 'Show only users from this group')
     = select_tag "group_id", options_from_collection_for_select( Group.all, 'id','name',params[:group_id]), id: 'group_name',class: 'select2', style: 'width: 20em';
     = submit_tag 'Apply',class: 'btn btn-default'
 
   %br
-
-
   = render "score_table"
diff --git a/app/views/report/max_score.html.haml b/app/views/report/max_score.html.haml
--- a/app/views/report/max_score.html.haml
+++ b/app/views/report/max_score.html.haml
@@ -39,6 +39,11 @@
           %label
             = radio_button_tag 'users', 'enabled', (params[:users] == "enabled")
             Only enabled users
+        .radio
+          %label
+            = radio_button_tag 'users', 'group', (params[:users] == "group")
+            Only users from this group
+            = select_tag "group_id", options_from_collection_for_select( Group.all, 'id','name',params[:group_id]), id: 'group_name',class: 'select2', style: 'width: 20em';
 .row
   .col-md-12
     = button_tag 'Show', class: "btn btn-primary btn-large", value: "show"
diff --git a/db/schema.rb b/db/schema.rb
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,76 +10,77 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_04_05_112919) do
+ActiveRecord::Schema.define(version: 2020_08_13_083020) do
 
-  create_table "announcements", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "announcements", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "author"
-    t.text "body", limit: 16777215
+    t.text "body"
     t.boolean "published"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.boolean "frontpage", default: false
     t.boolean "contest_only", default: false
     t.string "title"
     t.string "notes"
   end
 
-  create_table "contests", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "contests", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "title"
     t.boolean "enabled"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.string "name"
   end
 
-  create_table "contests_problems", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "contests_problems", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "contest_id"
     t.integer "problem_id"
   end
 
-  create_table "contests_users", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "contests_users", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "contest_id"
     t.integer "user_id"
   end
 
-  create_table "countries", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "countries", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "name"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "descriptions", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
-    t.text "body", limit: 16777215
+  create_table "descriptions", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
+    t.text "body"
     t.boolean "markdowned"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "grader_configurations", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "grader_configurations", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "key"
     t.string "value_type"
     t.string "value"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.text "description", limit: 16777215
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.text "description"
   end
 
-  create_table "grader_processes", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "grader_processes", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "host"
     t.integer "pid"
     t.string "mode"
     t.boolean "active"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.integer "task_id"
     t.string "task_type"
     t.boolean "terminated"
-    t.index ["host", "pid"], name: "index_grader_processes_on_ip_and_pid"
+    t.index ["host", "pid"], name: "index_grader_processes_on_host_and_pid"
   end
 
   create_table "groups", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "name"
     t.string "description"
+    t.boolean "enabled", default: true
   end
 
   create_table "groups_problems", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
@@ -97,13 +98,13 @@
   create_table "heart_beats", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "user_id"
     t.string "ip_address"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.string "status"
     t.index ["updated_at"], name: "index_heart_beats_on_updated_at"
   end
 
-  create_table "languages", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "languages", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "name", limit: 10
     t.string "pretty_name"
     t.string "ext", limit: 10
@@ -113,23 +114,23 @@
   create_table "logins", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "user_id"
     t.string "ip_address"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.index ["user_id"], name: "index_logins_on_user_id"
   end
 
-  create_table "messages", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "messages", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "sender_id"
     t.integer "receiver_id"
     t.integer "replying_message_id"
-    t.text "body", limit: 16777215
+    t.text "body"
     t.boolean "replied"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "problems", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
-    t.string "name", limit: 100
+  create_table "problems", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
+    t.string "name", limit: 30
     t.string "full_name"
     t.integer "full_score"
     t.date "date_added"
@@ -150,42 +151,42 @@
     t.index ["tag_id"], name: "index_problems_tags_on_tag_id"
   end
 
-  create_table "rights", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "rights", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "name"
     t.string "controller"
     t.string "action"
   end
 
-  create_table "rights_roles", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "rights_roles", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "right_id"
     t.integer "role_id"
     t.index ["role_id"], name: "index_rights_roles_on_role_id"
   end
 
-  create_table "roles", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "roles", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "name"
   end
 
-  create_table "roles_users", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "roles_users", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "role_id"
     t.integer "user_id"
     t.index ["user_id"], name: "index_roles_users_on_user_id"
   end
 
-  create_table "sessions", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "sessions", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "session_id"
-    t.text "data", limit: 16777215
+    t.text "data"
     t.datetime "updated_at"
     t.index ["session_id"], name: "index_sessions_on_session_id"
     t.index ["updated_at"], name: "index_sessions_on_updated_at"
   end
 
-  create_table "sites", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "sites", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "name"
     t.boolean "started"
     t.datetime "start_time"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.integer "country_id"
     t.string "password"
   end
@@ -193,11 +194,11 @@
   create_table "submission_view_logs", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "user_id"
     t.integer "submission_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "submissions", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "submissions", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "user_id"
     t.integer "problem_id"
     t.integer "language_id"
@@ -205,10 +206,10 @@
     t.binary "binary"
     t.datetime "submitted_at"
     t.datetime "compiled_at"
-    t.text "compiler_message", limit: 16777215
+    t.text "compiler_message"
     t.datetime "graded_at"
     t.integer "points"
-    t.text "grader_comment", limit: 16777215
+    t.text "grader_comment"
     t.integer "number"
     t.string "source_filename"
     t.float "max_runtime"
@@ -228,7 +229,7 @@
     t.datetime "updated_at", null: false
   end
 
-  create_table "tasks", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "tasks", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "submission_id"
     t.datetime "created_at"
     t.integer "status"
@@ -236,15 +237,15 @@
     t.index ["submission_id"], name: "index_tasks_on_submission_id"
   end
 
-  create_table "test_pairs", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "test_pairs", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "problem_id"
-    t.text "input", limit: 4294967295
-    t.text "solution", limit: 4294967295
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.text "input", limit: 16777215
+    t.text "solution", limit: 16777215
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  create_table "test_requests", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "test_requests", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "user_id"
     t.integer "problem_id"
     t.integer "submission_id"
@@ -252,13 +253,13 @@
     t.string "output_file_name"
     t.string "running_stat"
     t.integer "status"
-    t.datetime "updated_at", null: false
+    t.datetime "updated_at"
     t.datetime "submitted_at"
     t.datetime "compiled_at"
-    t.text "compiler_message", limit: 16777215
+    t.text "compiler_message"
     t.datetime "graded_at"
     t.string "grader_comment"
-    t.datetime "created_at", null: false
+    t.datetime "created_at"
     t.float "running_time"
     t.string "exit_status"
     t.integer "memory_usage"
@@ -272,20 +273,20 @@
     t.integer "score"
     t.text "input", limit: 4294967295
     t.text "sol", limit: 4294967295
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.index ["problem_id"], name: "index_testcases_on_problem_id"
   end
 
-  create_table "user_contest_stats", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "user_contest_stats", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.integer "user_id"
     t.datetime "started_at"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.boolean "forced_logout"
   end
 
-  create_table "users", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "users", id: :integer, options: "ENGINE=InnoDB DEFAULT CHARSET=latin1", force: :cascade do |t|
     t.string "login", limit: 50
     t.string "full_name"
     t.string "hashed_password"
diff --git a/db/seeds.rb b/db/seeds.rb
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -225,7 +225,7 @@
 end
 
 def seed_roles
-  Role.find_or_create_by(name: 'TA')
+  Role.find_or_create_by(name: 'ta')
   return if Role.find_by_name('admin')
 
   role = Role.create(:name => 'admin')