I'm going to hazard a guess that something is broken. I was looking for flights LAS - ORD for July earlier in the week. There was a decent amount of availability on BA. Most days had a redeye flight, but every Tuesday had an afternoon flight. The Tuesday flight was 8.5k AA miles - but was a Web Special. The Web Special fares were the only ones that showed up on BA. Ultimately I ended up booking with AA as I had a few miles with them. However, when I look now I see the same 8.5 k mileage awards on AA but nothing is showing up on BA.
Of course it could be that there's no availability across the board but I think it's unlikely
