yeah I noticed that... Well theres one way to find out for sure. Track the ip addess from the time the computer was accessed when the thread was posted, and see if it was from the same machine that is always logging on (the familiar ip, some people log in various devices) or if its a unique ip. That way you can determine whether you have some sort of spam bot on your personal machine (I consider this highly unlikely) or perhaps someone jumped on your machine and posted something.