I have a couple of flights on BA where I mistakenly entered my AA number instead of my CX number. I have spoken with BA res a couple of times, and gotten my CX number put in, however it seems that there are two FF number fields in their system. They are unable to remove the AA number from the first occurrence of the FF number field. The CX number appears in the second occurrence. I have verified this also by displaying the itineraries on checkmytrip.com where it does show both numbers.

Need advice on what I can to ensure CX credit for these. Can the AA number be removed at check-in? I dont want it in there at all, yet the agents seem unable to get it out.

Why are there two FF fields in the BA system?