I'm trying to book 4 seats to Europe using oneworld awards. According to KVS there are Z9 seats for ORD-LHR on June 3rd. When I call American to try to book the award, they tell me there is no availablity. KVS shows two flights 4674 & 4676, both having Z9. AA tells me neither flight is available.

Why the disparity?

At the same time AA tells me that flights 296 & 294 have first class award seats available, but I can't use them because they are code share. I understand that, but when I look up those flights, Z fare class doesn't even show up.

I'm so confused.