You should have stopped using the account if it was affected by the negative balance bug, but from the screenshot you sent me, it looks like exactly that. Also it looks like you deposited into one address twice at the same time. There has been an issue going on where one deposit doesn't show or goes into negative. So what you should take away from this is...Stop using that account. Even people with negative balances get repaid. Until a fix is implemented, make another buyer account.