Did the checkout today and talked with the front desk lady in a very kind way
about the problem. We both came to the conclusion that this problem is in a grey zone..... next time i will inform the reservation desk about the "second person" in the room (name e.t.c.) and if he is doing the checkin no one will care about where my person is....i was told.
So all in all no clear situation, becuase no one, even priority club, really knows