... That is, if I try checking out directly on the express-button, I can prosess the order, but when I return to my zencart, it states that the customer has one billing address N.N, road 9, 1870 Orje, Norway, and one shipping address; N.N., road 9, 1870 Orje, United States - meaning norwegian VAT is deducted. If I try to change the shipping address back to Norway in the cart, the order won't go through due to differing amount.

If I try using paypal after creating or logging in to an account in the cart, I get the shiptostate-error and return to step one.

Is something set up wrong in my cart? Anyone can help me have a look?