Here’s a new one for me. Both pilots are on reserve.

Pilot A: 3 days available. Assigned 1 day trip as only reserve available.

Pilot B: Takes 3 day GS over same days aftwr Pilot A has their original assignment. 5 hours to report CS drops Pilot A’s trip and gives them pilot B’s trip citing obscure PWA reference to maximize reserve utilization. Sorry don’t have the reference. Pilot A was unavailable for this trip at the time of the GS assignment. Pilot B out of luck for PB days and rotation guarantee. Told to just grieve it.