The Lock to All Students filter lets you show students without other groups. Since students can be in more than 1 group, the same records can show up in the table more than once for each group that is displayed and the student is part of. To lock to all students simply: Set the "Lock to All Students" filter to "Yes". If you want to filter by groups again, set the "Lock to All Students" filter to nothing or hit the Clear Filters button. Heads up: When a student is in more than 1 group, their records will show up more than one time in the same table if you have all your groups showing, once for each group that they are in.