Got the first email as well..... was in the 7/22 batch sent and received the email the same day. The email says that they have received the application and if required, they will email again asking for the supplemental fee.
Just wanted to say goodluck to everyone applying and sorry if you got rejected. Some schools are really random it seems like. I got rejected from buffalo the day after I sent my app and was like WTF!? No rhyme or reason...
If you email or call the school, the Admissions Director is awesome at connecting with students and applicants and would never be hesitant to review your application with you.
Again, good luck and hopefully I will see some of you coming by in a few months!