That's a lot of signatures. I verified the message of all of them on my Bitcoin Core node and it seems all of them are correct, so im sure that you will eventually get your account back, just keep trying, theymos and cyrus are very busy. Currently more and more people keep getting hacked, just look on the page 1 of the meta section. This must definitely be a database hack or something, it doesn't seem normal, but then again, this is one of the biggest forums i've ever seen, so maybe the rate of hacks to users is actually reasonable, hard to say.