diff --git a/app/views/report/submission.html.haml b/app/views/report/submission.html.haml
--- a/app/views/report/submission.html.haml
+++ b/app/views/report/submission.html.haml
@@ -36,7 +36,11 @@
             submission_table.ajax.reload( () => { submission_table.columns.adjust().draw() } )
           }
         },
-        'copy', 'excel'
+        'copy',
+        {
+          extend: 'excel',
+          title: 'Submission detail'
+        }
       ],
       columns: [
         {title: 'Sub ID', data: 'id'},
@@ -55,8 +59,9 @@
           d.since_datetime = $('#since_datetime').val()
           d.until_datetime = $('#until_datetime').val()
           d.users = $("input[name='users']:checked").val()
-          d.problems = $("#problem_id").select2('val')
           d.groups = $("#group_id").select2('val')
+          d.problems = $("input[name='problems']:checked").val()
+          d.problem_id = $("#problem_id").select2('val')
         },
         dataType: 'json',
         beforeSend: (request) => {