Originally Posted by
number_6
There is only 1 image when doing the opposite (booking QF issued ticket with BA sectors, and the clone is from QF to BA); so this is an anomaly in how BA propagates the PNR to QF which doesn't occur QF to BA. I hate to say it but one time that QF has superior IT system to BA, and this problem is BA's doing. In any case it is normal unless you somehow modify the shadow booking instead of the main one

False information.
2 Amadeus carriers on a single PNR will generate an additional 'ghost' PNR for the 'slave' booking. It does not matter QF to BA or BA to QF or any combination for that matter. Some 'ghost' entries are just harder to find.