I don’t think Netsuke would survive an xs package…just my opinion

Look how much extra packaging you can put into a satchel.

I would report that to Australia Post so your post office can get sorted out.   It is definitely wrong information.

With the best will in the world, counter staff often have no idea what’s going on (though Managers obviously should.)

I struck a new counter person the other week; they refused to lodge my pre-paid letters with tracking, because I had removed the back tear-off (“sender to keep”) which I was presenting for hand date franking. They said they had to remove the completed tear-off themselves so they could check that the address on the front of the envelope was the same. I didn’t bother arguing with them; I just stood aside and waited until one of the regular staff was available. Fortunately they only seemed to be filling-in for that day.