I always get my items delivered from here on Geekhack when it has a Tracking Number (like this CC had). It looks like the transit system knows when an item destined for me arrives here in Australia and they avoid it with a number because it can be traced where it arrives before sorting.
There are nasty. disgusting thieves here in this country (homeland of the original convicts) and they are embedded into AusPOST everywhere. Hence they avoid anything that can be traced. But anything else with no tracking number is easy pickings for them. It's that bad here when this postal system makes the ones in South America look so honest and efficient.
There I had to say it. Australia is not the land of decency but the home for thieves and liars, as evident by our political leaders that currently run it.