What happens to award inventory if I waitlist 2 seats for a return (roundtrip) where the outbound is on waitlist and the inbound is available? Would AM reserve the 2 available inbound seats or is it possible that someone snatches up these seats while i'm waiting for the outbound to clear?

The outbound is LAX-HKG on Dec 15 so I'm not feeling particularly hopeful. Loads in PE are W9 R9 E0.