I dont know if this is a bug or not.

But check this out - I know you can reproduce this:

1. Go into any course enrollment with alot of people in it that you used groups to populate.
2. Filter to just that group with the filters tools.
3. Click on the green check box to select the row of people on your screen
4. Now click on select all at the bottom of the enrollment
   1. You land up with ALL instead of the filtered value.

This feels like a bug….no?

With this fixed? I could en masse change a validity date for a course….send an email to just a group...