Still Problematic

I really want this to work for me but it seems to be wonky as hell. I think I have only gotten a single, error free run so far. Just now, I selected a single student to test the email reports and it emailed the entire class. Then gave me an error message again, so I can't even be sure if it emailed everyone. It might very well be user error, but I'm not getting a good clue as to what...