I am trying to set up my store with free domestic shipping. I followed the instructions found at http://www.e-junkie.com/ej/help.shipping.php, but when I set the domestic price per ounce to -1 as instructed, the cart keeps subtracting -1 times the weight of the product from the price. So, for my products that are 5.5 oz, it is subtracting $5.50 from every order. I want it to just be $0 shipping for domestic, not give the buyer a discount on the order!