Collectible Card Game Headquarters

i just started using xmage a few days ago. i played several games, and then it started saying the card on a deck i had been using couldn't be found. there are other missing cards, but it started saying that about ones i have been using already. anyone else have this problem?

also, i'm having trouble logging in. it keeps telling me my username is already in use. anyone else have this problem?

The server was having problems and needed restarted.