Ok I found the problem. Apparently in week 7, last NA match was played after the admin mod update, which changed the log format a bit. The script got a bit confused since it wasn't properly adpated to that and logged the spawn and round numbers inccorectly in the database. A few NA stats that relied on this info got messed up as a result, like serial killers and initiators/shield stealers. Thanks for uh... kindly pointing it out surkan, and responsibly making sure i dont miss it both in steam and on forums ^^
Should be fixed now.