A little more crude than that.... I've replaced any charge < $8.40 with $8.40
(in keeping with the principle to 'protect the merchant')

I still need to do more work on this code.
ok.. just like to report you a bit more. It seem like A2 satchel price is not working... I have them enable and changed one of my product to weight 4kg to test it out and the price still show up as $8.40 instead of $10.10... after you made change to the code seem like it only shows one price.

cheers,

Kieran