Is this a product that has options? Such as different colors, or sizes? if this is the case, when you add the size or color column to the cart, set those columns to be unique, that will force item 1 in red to be a unique item from item 1 in blue.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.