[xwiki-users] Editors changing styles!

Hi I have been using the wiki editor to add some html (all div id="..", and div class="...") to create the look for the home page. This was all progressing nicely and I was getting very close to the end - or so I thought! I then switched to wysiwyg editor where I found that the look appears unpredictable. On swithcing back to wiki editor all my lovely code has disappeared to be replaced with in-line styles. When I tested the page the layout had fallen apart. What am I doing wrong? Should I only be using the wiki editor, and not attempting to use the wysiwyg for this type of work? Thanks all Edward