What program are you using to create your product descriptions?

I'll bet you're doing this...

You're writing your product descriptions in MS Word, then saving these as HTML.

Then, you're toggling to the source (or perhaps not), and using COPY and PASTE to put these descriptions into HTMLArea (or FCK Editor as the case may be) on your product editing pane.

Trouble with using MS products - even MS Word - to create descriptions - is that it formats the stuff in that excruciatingly annoying microsoft way.

If you want to create your product descriptions in a HTML WYSIWYG editor, do it with a reputable piece of software - and that excludes anything put out by MS for this purpose.

When you have the raw html, you need to TOGGLE to html mode in HTMLArea (the <> icon) and paste the raw code there.