Just a thought on this one.............
I had a similar problem when I set up an airport I designed with AFCAD and then populated with AI shedules. Most of the AI routes into the airport were short, about 30 mins flying time. I went to my airport at a busy time on my shedules when aircraft should have been landing, but nothing.......only aircraft taking off.
I checked everything and found no faults, so I returned to the airport and waited 30 minutes, low and behold! aircraft started landing.
My assumption was that the clock is set when you start FS and that landing aircraft will not appear untill they have had time to fly their complete route. I don't know how long it takes from Auckland to Perth, but maybe this is the reason?
I am probably wrong, but from my own experience with short routes I thought I would throw this one in.

Ivor