Ugh, this has finally happened to me and I have no idea why.

Tomorrow I'm flying SEA-LAX-LHR. I applied a GPU and SEA-LAX cleared immediately while LAX-LHR was waitlisted. It continued to show properly as waitlisted in my reservation.

I just did OLCI and sure enough my name isn't on the mobile.united.com upgrade standby list and my waitlisted segment in the reservation is now gone.

Time to call UA and get the run around with probably no resolution. Here's to hoping they're able to fix this before I go to the airport tomorrow...

-RM