I start to think it's laziness.  From here sometimes I track to Sunshine (usually for WA & SA, very rarely to a state north of me or last week it was Morwell (forgotten where that was going).

Usually if the parcel is going to NSW, it doesn't appear to get sorted till it reaches its destination - actually I have one still in transit - posted some six months ago.  Presume the buyer received it as have had no contact & no feedback received either.

Posted a parcel for my friend yesterday going to Eastern Vic, shows in transit, but I saw it logged in & got a receipt but no lodgement advice online as it usually shows.

Registered mail - no receipt for lodgement, never any tracking until it reaches its destination.