I have 2 categories of products, each with 2 flat rate shipping costs, based on address. This is all set up and working.
However, if the customer buys one product from category A plus another from category B, checkout currently will add the two flat rate shipping fees together. However, I just want to charge them the higher rate once (e.g. product A has flat rate of 5.00, product B has flat rate of 10.00, both ordered in one shipment - I don't want shipping total of 15.00 but rather 10.00). Can this be done?