VAT-problem

I’ve a problem with the VAT-amount over the shipping costs. it happens when a order is placed below the minimum order amount and the order is “blocked” for that reason. When a customer adds another article to the cart the VAT amount over the shipping costs have disappeared. When a new order is placed above the minimum order amount the shipping costs are correct. Because I didn’t get a response to my support ticket a week ago I hope this review will be commented (answered).