If you were able to check out with them and get a receipt--> you're in. However, if you see any error or "sold out" notification while checking out, that means that the release window has ended and the supply for the day is up. So if you got a receipt, you're good to go. Otherwise, see you again tomorrow night.
I ordered some last night at midnight. I had a little bit of a problem entering my CC number but it finally went through. I got a confirmation Email/receipt. The thing was at one point, when I clicked "submit" it took me back to the main page of Wynns and said sold out. I clicked back 2 times and resubmitted and it went thru... weird... but hey, he said that if we got a receipt, we're good to go right?