Kirryn's nailed it on the head. WYSIWYG editors create really crappy, tangled, messy, non-standard, non-semantic code. You can't expect it to make miracles for you.

By hand-coding the site, you know *exactly* where the problem lies since you wrote it.

Using Dreamweaver and the likes

If you want a site that works cross-browser and printed, learn HTML, learn CSS. There are plenty of resources out there so there's really no excuse.

Resources for learning how to use CSS for layout