Could be because of multiple reasons. The best you could do is probably contact an admin, and probably prove that you're actually the owner of that account you linked; by signing a message using the bitcoin wallet you stated on your account.

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EDIT: yo take a look at the signature section of your account:


Not sure if that's actually legit lol. It says theymos(bitcointalk admin) but it's domain is "theymos.e4ward.com". I honestly don't know about that.