Not sure why the fuss over the name?   Australia Post Parcel Post Parcel   Company name + service used + sub category   *shrugs*

Because it's redundant. Why would 'parcel post' NOT be for a parcel? Saying 'parcel post parcel' is a tautology.

And also having the word 'post' appear twice in a five-word name is just the icing on the cake.