It is simpler. Firmament dinghy came to Melbourne first and only then went to Brisbane - no one knows why, but I guess they just wanted to get unpredictably delayed due to whatever logistic reasons. And then Melbourne is so ... they couldn't sort it out for so long that FA reaches Brisbane, unloads cars there and cars get delivered to the customers, while Melbourne port is still somewhere back there trying to sort the things.
I don't know, but if I were a company which shipped vehicles, I would just avoid Melbourne as much as possible. And probably if I were any other company.