There are two issues here:

1.) In the case that Shannon explained.

An elite was waiting for the upgrade and the upgrade inventory was 0.

A non-elite was checking in to buy an upgrade and the system said "sure, we'll sell you one" This transaction was possible while the elite was still waiting for the upgrade and the elite only cleared so very close to departure. I think we (and UACO management) should agree that buy-ups should not be triggered until upgrade inventory is >1 and all the elites have been cleared.

2.) In the case highlighted by kokonutz where there 11 people on the list and the other cases that have been brought forth on this thread. UACO has either tons of non-revs flying or there is ...ahem.. a glitch in the system.