Interesting......... On a recent flight to WAW in Y I had one suitcase (22 kg) and my wife's small bag (she was on hand luggage only ticket so I wanted to check both under my name). Initially she said I was only allowed one piece. When I queried about gold card she said its still only one piece. But then she allowed my wife's bag as a courtesy since it was small enough to be carried as hand luggage anyway.