Did you get a letter in the mail that said your application had been sent to schools? Is that what you mean by the 8/15 date?
I heard from UT Houston about a month after my application was processed. And I heard from UTMB last week, which was almost two months after I was processed. Those are the only 2 I applied to.
I'd call the schools and make sure that they have your application. Can't hurt.