multiple posts can happen if the server (btw, it is as of this moment still running on backup as Edmund is trying to solve all the niggly problems) decides to hang while posting. if you click "submit" more than once, it will resubmit your thread again.
or... TS deliberately create multiple threads.
regardless, we will clean up the threads as fast as it is humanly possible. if you see any, just use the report thread function. someone will get to it eventually.