Originally Posted by
1K_From_SNA
It doesn't make sense to me, but then I'm not surprised I guess with the CO system.
This has nothing to do with SHARES.
When you look at the flights, is SFO-NRT-BKK one flight number, or two flight numbers? What about BKK-NRT-LAX?
If it is one flight number, then the upgrade will waitlist; if they are two flight numbers, the upgrade should waitlist, but the available segment should clear from the waitlist immideately.