That is an annoying aspect of searching for award availability through the AA website. What's also annoying is the website showing Saver Business or Saver First availability, just to see that it's only the short regional jet portion of the trip that is in First and the rest of the itinerary (including the overseas portion) is in ECONOMY.
You may have better luck calling in. As you know, the website only shows partner availability for only a handful of partners.