Lists are referenced differently than text boxes... you must be using the wrong syntax, or you have more than one field on the page with the same exact name. Those are the only two causes of that behavior I could think of.
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.