First off, the confirmation email you guys sent me clearly states: "We have made a direct deposit into your MTGox account and there is no need to use the coupon system on this order" So why I'm now being directed to enter in a code is beyond me..
Secondly, MtGox support told me to try entering that code LONG before I had even created my account here, let alone posted that info. So if someone did steal my code or whatever, it surely wasn't from my posting that reply because when I tried to use it before, long before I had posted any of that information here in these forums, it gave me the same error message, and I have not posted it anywhere else. Just in emails to MtGox support.