Our system was having a problem of allowing duplicate display names before. We could all have the same Display Name if we wanted and no one would no who was who unless you went into the profiles. 
Bad Glitch!
So, we finally received the patch from our forum provider to fix that. What it does now is IF your name is considered a duplicate,(Someone else had the name first), then it will attach an extra letter or number at the end of your Display name.
But here's the deal: If you are regular poster and we know you by your display name at this point, and the other person who created the same display name first has never or rarely posted in the forum, then we will give the priority to you, and we will manually change it so you have your Display name back to the way it was.
SOOO....if you find an extra letter or number now in your Display name, Just reply to this thread. Do NOT change yet unless you are advised to.