"But I expect that if all flights/points/miles go to AA, he will make AA Plat via teh challenge,"

Nah, he won't. He will end up abouy 122 points short of completing the challenge from what I can tell

Miles Points

QF PER-MEL 0 0
QF MEL-BNE-NRT 0 0
CX NRT-HKG 0 0
AY HKG-HEL 4860 2430
AY HEL-AMS 948 948
BA AMS-LHR 125 125
BA LHR-DME 793 793
AY SVO-HEL 545 273
AY HEL-JFK 4117 2059
AA JFK-MIA 1090 545
AA MIA-ATL 595 298
AA ATL-ORD 606 303
AA ORD-YVR 1764 882
AA YVR-DFW 1754 877
AA DFW-LAX 1235 618
QF LAX-AKL 0 0
QF AKL-ADL-PER 0 0

Total points earned 9878. Total miles earned 18432 which is nearly enough for an economy r/t from anywhere in AU/NZ to anywhere in AU/NZ

If he rebooks the LAX-AKl onto AA, then he will attain it. Also, one thing, I can't see any QF flights from AKL-ADL currently in the timetable

Dave