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I just launched my shop yesterday and found a problem. Out of the 300 products we offer, a few do not behave in the shopping cart when a customer tries to check out. I have encountered 3 distinct problems which do not overlap with each other: 1. Shipping will increase $6.65 per item, regardless of the weight or dimension of product. 2. No carriers will be available 3. A free shipping promo code results in no carriers being available (this even happens with products which behave themselves). Other information to help you help me: - Using PS version 1.6.1.4 - We use just one shipment module, the All-in-one USPS made by Prestashop. - This module works perfectly when I have any of the 200+ non-problem products in the cart. - When I compare the problem products with the non-problem products, there is no difference in the settings. Is this a problem anyone else has had? How do I fix it? Do I need to buy one of Presta-Shop's support plans? I don't do any coding myself, so I can't fix it by looking at the code. Thanks for helping this newbie!