I'm having some issues with US Airways availability...

1. I'm trying to change a BA Avios booking that included a domestic AA flight to a domestic US flight. Using KVS I see FS8, for example, in the award section of the tool' though BA tells me there is no availability on that flight.

2. When digging a little deeper, I see that some US flights that show availability in the awards section, don't even appear as flights in the regular availability section (the first tab).

Are these issues related to a POS problem, a misalignment of award fare categories, or something else?