PEK-SFO for tomorrow, checked in 3 hours ago but not showing up on any upgrade list. I have a SWU and been on standby for ages, 9 C seats open, so i guess I might still have a chance at the Airport, but my name isn't showing up. Can it be because they need to check documentation in the airport? United screwed up system? Both? Be very upset to sit in my nice middle seat 13 hours Thanks Clarkyboy.