Please be aware that we will re-fund any shipping over payment. Our system sometimes calculates the weight per item, and not actual weight as every item weighs differently. Please feel free to reach out and messages us if you have any concerns at checkout. Once again, when we process the orders and do the actual weigh in, the amount we pay is the amount you pay for shipping, we don't charge extra fees, and we will refund any overpayment. We apologize for the inconveniece as we are trying to get this issue resolved. Please feel free to reach out to us with any questions.