Big issue when change text's font and size

Even on Fckeditor demo site, the demo editor has same issue. For example, you can go to this url to copy all content into editor,

http://www.geierassetmanagement.com/new ... =401990464

then use "Ctrl-A" to select all content, then select one font or size from the editor, then you will see the title of page will go to bottom of page, all paragraphs are re-ordered. The content on the bottom of the page will go to the top of page. Sometimes, it even lose major content after you change font / size from the editor.

It is really a big issue since user can't change font / size by the editor. Your content's order will be changed by editor or you will lose some content after you select font / size from the editor