I am not sure what I am doing wrong

With Amadeus: Awards/CX, I could find YS+ on CX 879 (SFO-HKG) and CX 765 (HKG-SGN). Cathay website shows that those flights are available for economy standard award.

ExPlat desk insisted that there was no coach award on those flights, only first. Does it mean that I can't use Amadeus: Awards/CX to search for AA awards?

Please help!

Thanks!