Sooo I'm not really sure how the shipping costs work I guess? I had it set as $2.50, with .50 set as the with additional items. Someone bought 2 each of 2 separate listings, same shipping category, and it charged her $2.50 for shipping...?
Also, is there anything else I can do with shipping costs? A lot of my items are $2.50 shipping, and until you buy 3-4 of them, weight is still $2.50 so I don't want to charge more, but I want to charge enough when it should be, like the above situation should have been $3 shipping.