Our MySQL database got screwed up yesterday afternoon and heavy lag problems persisted until the early night. I'm not surprised if you posted that post during the lag period and some part of the code didn't get through, like your Member ID, that's why it's labeled as an Addition.
So did I get screwed out of a post, or did he?
I really don't know how the MySQL database has interpreted that post. Chances are that it gave 1 post count to the first who posted and the second poster got none.
Hmm, something similar happened when we used to be able to do the thread change glitch. Perplexing.