There's nothing worse than trying to mop up data duplication/errors after some work/processing has been done to it as trying to find what to remove is the SQL equivalent of trying to suck popcorn kernel husks out from between your teeth.
Sorry about the LARP DB, my mood fell off a cliff for a good week there, and I was planning on getting back on the wagon last night but oh no, the New Zealand group kept borking setting up work orders for our crews to do work. >.<;