Quote Originally Posted by NM
I completely understand your example where you booked SYD-MRZ return. It just hapens that in that particular example, QF's system issued the ticket as three segments (SYD-NAA, NAA-MRZ, MRZ-SYD) and hence since it is ticketed as three segments it will credit as three segments. But if it has been ticketed as SYD-MRZ and MRZ-SYD, then it would only credit as two segments. I am not going to try an work out why QF's system would issue SYD-MRZ as SYD-NAA and NAA-MRZ as I have no technical insight into the logic of QF's booking systems.
It is because the NAA-MRZ sector is used for two different flights, SYD-MRZ and NAA-SYD. If it was not handled this way, it would be theoretically possible to have NAA-MRZ oversold.

Dave