Good luck in trying to get TK agents to understand that you want to REMOVE points...

Let is go; you will most likely end up spending time and calls without getting nowhere. As the previous poster noted: you did in fact benefit a lot from your TK elite status being registered for this flight.

It has been reported in this forum that the lounge agents change the registered FFP in order for the automated lounge entry gates to work/open when you scan the BP barcode.