Has anyone experienced on the BA site where a bunch of J seats will open up for an approaching date, but then after a few minutes all those availabilities disappear? It's happened to me two mornings in a row now, looking at HKG-JFK for Aug 11/12. I've seen 3-5 spots open up suddenly, I'll call AA immediately but when they check the specific flight they don't see anything. I'll refresh BA and none of those award space are available anymore. Glitch?