You hit the nail on the head so many points. Someone obviously doesn't realise where his payments have been coming from for all those weeks where he hasn't 'done all the hard work' and found a block. On a side note, I don't believe Ozcoin offers POT anymore, it does still mention POT on the home page which I think this just hasn't been updated in forever, the actual user configurable pool options state:
Not sure if any other pools offer POT?