Just an update. As I suspected, no questions asked at the airport when I went to check in 2 bags. Unfortunately, that gives no explanation as to what happened with OLCI. My theory is that when I booked the ticket (1/2009), the first bag was free for all pax. When the rules changed, whatever they did to make the system recognize the old rules must have forgotten to include the fact that golds got 2 bags free. Who knows.