I think I'll be out of luck, but wnated to check with experts before I call UA.

I'm flying LAX-SIN on flight 1 (stopover in HKG). I know that 1 Systemwide will take me all the way to SIN even if there had been a change of flight numbers.

On the way back, I am flying UA 2; however, I am stopping for about 50 hours in HKG before leaving for LAX.

Other than using three Systemwides (no thanks), am I correct that I will be out of luck for an upgrade from SIN to HKG?

Thanks.