So, I ignored all the advice about not mixing the world's leading merging carriers and on Sunday am scheduled to return HKG - NRT - ORD - DCA. I am waitlisted to use a SWU on NRT-ORD. The HKG - NRT leg is a PMCO 737 that, as of a week ago, is now listed as UA78 (it is a "redeployment flight"). Continental Plat desk said they have no control over this flight anymore and can't even see the upgrade list. The 1K desk told me that there was no way to upgrade that leg without burning another SWU, and that until NRT - ORD cleared to just hold tight and I would be added to the upgrade list then, since right now I have instrument to support the upgrade. Then, tonight, lo and behold, the CO website has that flight showing me in R class with no seat assigned and no seats to assign. UA site still says I am in Y but my seat has been unassigned. I call the 1K desk and after about a 30 minute wait am told that I did indeed clear and have been assigned 2A, which now shows on both res systems. Just wondering if others are seeing lots of similar situations. Merging these systems has got to be hard, and I think people who aren't proactive are liable for surprises. Then again, maybe people who aren't proactive don't care as much!