I am using multiple flat rate shipping with one rate for domestic and one for international.
When customers checkout with paypal from the cart it returns them to the checkout page so if they are international it will charge them the international rate.
The problem with Amazon FPS is that that if they click the pay with amazon button in the cart it picks up the domestic shipping rate. Since they are not returned to the checkout page an international order does not have the chance to get the international rate applied to it!
Do you know if there is a solution to this or is it just the functionality of Amazon?