Welcome to the world of monumental stuff-ups by our only postal service here in Australia Alicia. You will gradually learn to turn a blind eye to their so-called 'tracking'  and so-called 'services'. - It simply doesn;t work for either us or them. If you approach you local PO with all the necessary information and various bits of paper etc. and give it to them, even they can't find it or track it. You just need to have some sort of blind faith and hope like heck it eventually gets there.