Originally Posted by 
camel_landy
				 
			Right,
When you bring the car in, you have to clear through customs & AQIS but once through there you need to get the car registered. You don't need to fix Oz plates to your car but instead you get issued with a bit of paper, which is your proof of registration and your 3rd party insurance cover. Once you have that, it'll cover you for any Oz state.
So, it sounds like there might be a couple of things going on here:
1 - You didn't do that last bit of the registration process (get yourself off to a VIC Roads office if you haven't).
2 - Technology - You're just confusing the hell out of the ANPR system, the coppers don't know what to do and just slap you with a fine!!
Personally, if you're registered and it's just an issue with tech, I'd just ignore it all & stick the fines in your scrap-book. As a traveller, you don't really have an address they can track you back to!! ;)
M