Is this happening for you when you delete any div or is there a certain set of steps you are taking that are getting you this result?
Also please post back with the DW version, and OS you are using.
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.