Can someone with experience using the CX site to see award availability help me?

I log on, and supposedly see availability, yet when I call AA to try to book, they say they don't see any space at all.

I want to fly Hong Kong into PEK or PVG in early August 2008 in first, business or coach.

If I search HKG-PEK for Aug 6 in First (for example) it finds no flights, and bringing up the availability calendar confirms there is nothing either side as well.

If I search HKG-PVG for Aug 6 in First it returns 16 flights, with availability on 9 or so. Yet AA reservations say their are no reward seats available in any class. And as an interesting aside, if I click on the availability calendar link, it seems to contradict the prior screen and confirm AA's story by showing all dates as X's (no seats).

Is this some sort of bug in the CX system, or am I missing something?