I was telling all of my friends last year to register for the free birthday admission and it dawned on me that I had never received any kind of confirmation via e-mail. I was thinking maybe I would get it closer to my actual birthday in July, but then I read some DIS'ers' posts about receiving the e-mail confirmation immediately after registering. So I did exactly what you did (about a month or so ago) - I registered again, just to be sure. And I got the same message - that I was already registered and didn't need to re-register. But, still, after the second time doing it, THEN they sent me the e-mail with the code on it. The code was right there on the e-mail. So even though they said it was not necessary to re-register, I am glad I did because I got the e-mail with the code. Why didn't they send the code the first time around? I suspect that so many folks registered that maybe there was a glitch in the system somewhere and the computer didn't send all the numbers out as it should have.
The other thing that is driving me nuts about the get-in-free on your b-day thing is that just recently, somewhere I saw a different explanation of what you can get on your b-day if you already have Hoppers or what your choices are based on the different level of tickets. It was basically the same info we all already know but it was laid out differently than I had seen before. They broke it down in a different way, like 'if you have a 2-day hopper, you can get this or that or that,' and 'if you have a one-day/one-park ticket, you can only get this or that,' etc. For the life of me I cannot recall where I saw it and it is driving me crazy! I don't remember which website it was. The reason why this particular layout of what you get on your birthday was important to me is that it seemed to imply that if you have already have a one-day HOPPER, you can get an alternate gift such as the gift card. But on the DIS, everyone seems to imply that any kind of one-day ticket, whether it be for one park or a Hopper, does not qualify anyone for the gift card. This one website I looked at - whatever it was - broke it down in such a way that every level of ticket was clearly explained as far as what you get or could not get and I think already having the 1-day Hopper qualified for a alternate gift of the gift card or somethign else. This website I stumbled on accidentally was the only place I had seen it explained that way - every other place just seems to refer to AP's, to one-day/one-park tickets OR to multi-day Hoppers. But nowhere do you see a one-day Hopper mentioned. This was important to know for sure because certain friends of mine who do not have AP's would only have one-day Hoppers on their birthdays (they would probably print those at home in advance) and would want the gift card instead.
You are not kidding about this side of the board being busy! Last week sometime I posted more pictures on my TR, and within a few hours the TR dropped waaaaaaaaaay down on the page! What is happening is that a lot of folks are doing pre-TR's, I think. You practically have to post twice every day just to keep the TR up in the top 20 Trip Reports!