I've known about this issue for 20 years... It isn't anything that has changed. It only happens for some server behaviors and it depends on where the hand coding appears.
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.