that is crap, I would file a complaint too. My shopping cart goes based on weight, but what ends up happening on my end when I ship out the shipping ends up being more than what the cart says. I never charge the difference I just eat it. Am I loosing money,well yeah, but it's better than po'd customers IMO. Its on my end, it shouldn't affect the original sale. They should reimburse you the difference at least 5 bucks anyway.