I posted this over on MP's integration thread, but this one's more active, so I'll post here too.

When searching for award flights on *A partners, it seems that the number of seniors isn't taken into account when searching for saver availability. Searching BRU-SFO, I found two SN flights that would have worked, but they wouldn't book. When I called in, the res agent said there were only two seats available. Sure enough, I changed my criteria to three adults and the same flights didn't show as available for saver awards.

So I think there may be a bug there. Not huge in the context of things, but fixing it would help reduce call volume.