Why can't I log in to my user?

[alderman2]

My account is "alderman".  When I try to log in, I get the message that the account does not exist.  But there is, I can see my previous posts.
 Why does that happen?

[MrBcx]

Your "alderman" account does not exist, only "alderman2" exists (was created today).

Your previous posts under the now missing "alderman" account have been moved to the "guest" account.

I don't know why.

* Perhaps you accidentally deleted your old account.
* Perhaps a moderator accidentally deleted your old account.
* Perhaps the spam/troll killer plugin has a bug in it.
* Perhaps the forum software has a bug in it.

That's all I know at this time.