I have an upcoming flight, where the aircraft was changed from new to old 777 configuration. I was reassigned to an undesirable seat in C. I changed seat selection on-line and logged out and back in again to confirm that my selection "stuck". Nope......reassigned back to the newly reassigned undesirable seat. Same result after several attempts. Called 1K desk and agent says she was able to move me to my requested seat. Logged back into my account and no dice.....seat map shows me in the original undesirable seat. Called back in and described my situation. Agent changes my seat and after I ask her to confirm, she advises me that the seat map still shows me in the undesirable seat. She then takes a look at the "passenger list" and tells me that I am assigned to my requested seat. This sounds like I'm headed for a problem at the airport.

1. When I print out my BP, will it show the undesirable seat as reflected on the seat map and reservation summary, or will the BP reflect the seat as shown on the "passenger list"?

2. It looks like there is a distinct possibility that there will be a double assignment of the same seat.

3. What has priority at the airport if a conflict exists....the BP or the "passenger list"?