This is incorrect. Your miles-based upgrade is supposed to be transferred to the airport and you are ahead of any EUA folks if it gets to the gate for the upgrades. I am not certain how it is handled between T-24 and the gate as EUAs can be processed in that window but the miles-based upgrade on the list would likely not be as that list is handled only at the gate.

As for that flight in general, it was booked full with 5 upgrades 2 days ago and still like that yesterday. Apparently two of those customers chose not to fly as there were 7 cleared as of this morning and it was still booked full.