I have the same question. I tried calling an agent today, and while my last Y+ flight was a year +, I didn't have this problem then, but I do now. The agent I called today specifically told me the seats (ie. bulkhead Y+) weren't available because they were reserved for elite members. Unfortunately, I've lost my silver status over the last year because of my flying patterns. Is this really the reason? Or is it not wanting to give the seats away in the event of a baby requiring the seat?