This has actually been a problem for awhile, but today was the first time it actually screwed me. Apparently when you use the website, the system "loses" the offer code, so you get the room reservation, but not the tournament registration. Usually they're able to put it through when I go to register, but today they sent it to a director for approval and... they told me no go, I was "overcomped" (where have I heard that before?). So from now on I'm calling marketing/my host and making damned sure they send me a confirmation with the tournament details.