australia post shipping not correct

I have everything setup and so close to this all being right but the shipping is out by about $10. AUSTRALIA POST shipping plugin. Does this need updating or something is not quite right. I have grouped products but if I don't then it is too much.
Thanks for help please.

Oh well, I solved this myself for anyone else who had problems - I had the POSTCODE or ZIPCODE of the sender set to the closest largest town - in this case Brisbane Australia. When I set to the regional zone it is coming from, 100km from Brisbane, all is now correct. In configuration.