If your airplane.cfg includes the ICAO code of your airline in the atc_parking_codes parameter, this will take precedence over any other selection method. It’s assumed you will preferably load containers with the airline logo of the airplane.If your airplane doesn’t have an atc_parking_codes parameter in its aircraft.cfg file, the selection will be made per airport, using the same selection methods as the handling vehicles. In this case, it might happen you will load containers with a logo on departure, and a different one when unloading on arrival. This is normal, and can’t be prevented if your airplane.cfg doesn’t have the airline code set.