But what would be the point in posting a staff accounts alleged password?
To try and scare people perhaps? No idea.If that is the correct password than 
That isn't achow's password, it is the stored hash of the password. If his password is strong (which I expect it is) and if he's already changed it (which I expect he has) then it would be impossible to get his current password from what that user posted.
The forum was hacked a few years ago and the admins are doing everything they can to strengthen the site from hackers and if information about the site's weakness is leaked they will be the first ones to know about it and fix it and If you're the user who has his password publicised you know if it's the real or not and you can change it if you still have it.