There were problems with the stores yesterday, in general.
At first the problems were okay; though it charged full price (not the cheap-o price listed), it also gave back a LOT more than that when stuff was sold (made 4k on my new baby pirate by buying and selling coats [1k per transaction - 4k seemed to be the limit; past that and it would all disappear again]).
They seemed to fix that really quickly, so that it would still charge full price, but give back peanuts (like, 5 gold on a 500 gold item kind of peanuts). Personally, I preferred the first bug.
Anyway, not sure what the deal is now, but considering the other issues, I'd just give them a little while to work it out (though, I of course think they should have had it working
before they decided to focus a promotion on it...WTG, Big D
).