The guide in my Media Centre (IceTV fed) and the IceTV app on my android phone are showing the GP being telecast on One at 5:30am in Perth. The online Tenplay guide and Freeview guides both show it as being telecast at 2:30am. As far as I can tell, the other listings on One and other channels are all correct, it's just the GP that appears to be incorrect.
I've also noticed a couple of occasions where NFL games have not been listed in the same order that they were telecast over the past 2-3 weeks.