i never got that email either. But it said my code was accepted, so I am just leaving it at that.
I never got the email, but I contacted them to check and make sure nothing was screwed up, and they said it was fine- they had all of my order info correct. They weren't sure why some people didn't get emails. If your code was accepted, you should be fine. That is if, like you said, any of us ever actually get the shirts.