I listed item to sell (P248951064) and used the feature to calculate shipping costs.  Box dimensions and weight was added, and amongst the choices offered was "Courier Canterbury Rural - $12.73."  Item sold, buyer selected the Canterbury Rural option for $12.73.  I ordered the courier, and on entering buyer's address I am informed that the courier fee is now $14.49.  I checked the address given, and it is about 5 km outside of Tinwald, Ashburton 7778.  This is definitely a "Canterbury Rural" address - it is not "rest of South Island Rural".  Why has the Trademe algorithm got it wrong?  It i...