Just because you could not sign it, does not mean that your account was hacked. You may have forgotten your password. If this is the case, please contact me and we can figure it out.
But I doubt someone would try to hack accounts like that.
Really, theres no personal gain from hacking AG accounts, so no one would do it. I personally doubt this, and even if it was true, theres nothing we can do.
if your account really got hacked then use the forgot password option it will send an e-mail to your account and you will get the chance to reset your password for the lost account
TotalReview is right about the 3 one, did any of you're friends go on and you did log out or did you remember you're password on you're computer because some friend could stab you in the back.