BTW, it also needs to be stated again that even if "upgrade seats" (read: "R" bucket) is available it does NOT mean that the EUA system will upgrade you. This is covered in many different threads on the Continental sub-forum. It's a misleading indicator, unfortunately.
I haven't heard stories of CO not recognizing UA status. As long as your MileagePlus number is in the reservation CO will upgrade you as a 1K. I'd recommend you remove the number and re-add it to your reservation. That will force CO to go 'search' for your status again.
-RM