I am going through the same scenario right now. CDG-PVG on Air China. I was booked and confirmed first class, then later switched to business. Corptrav said that discounted first was no longer available. First question is how is Air China on this routing? Second question is why did neither fare equate the published accepted fare, they were both higher? Third question is how much longer are we going to tolerate this cloak and dagger, completely invisible process behind the curtain? And fourth question why are we still dealing with it years and years after the problem surfaced?