No, no idea why that may have happened.
Dreamweaver is not a very reliable FTP program, It often has weird hiccoughs on uploading files.
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.