i think i know what may have happened.. perhaps.
you know you are a MOD on that forum, which means you can MODIFY other people's posts.
i think you may have modified someones post thinking you were replying to it.
when you do that, you dont change the poster name, you will just end up with a line at bottom "modified by..."
the reason im pretty sure thats what happened is i can see that you did it
well at least i think i can.
i see you modified a post by joiwind and turned it into a reply to his post.
i've actually done this myself once or twice, thinking i was replying but i was really modifying.
some people just aren't ready for mod powers