I saw F availability for IAH-FRA on a A380. Check award nexus, and it confirmed the availability on all AC, NH and UA. But when I called UA to move me into First, they said they could not see any availability on any bucket. Called again, same answer. On their website, I could select it, and reserve it (but I didn't do it, because it's only 1 leg of my 6 legs itinerary). ... argh, I want the A380 first and FCT access so bad. what to do ??