Problem Validating List Items with W3C

When entering product information, I'm finding some glitches:

1. In Products Name if I try to escape an "&" with & the correct character shows up in the preview and on the product page, but the W3C validator reports an error that the character & can't be used.
2. In Products Description the same issue with entering escaped characters.
3. Also in Products Description, I set up a DIV ID for an unordered list with list-style-type: none; and some margin settings. CSS in my override template css_new.css sheet. This shows up fine on the actual page, but it's ignored in Admin (where I'm entering my product info) preview - the bullets and default margins still show up.

Even though my unordered list code is correct, the W3C validator has issues with it. I'm wondering whether the problem lies somewhere within the interaction among the database, Admin (makes the list, but ignores the ul div
declarations), and the actual output to the page (honors the ul div).

ZC v 1.3.5 - Mods: Improved Attributes Controller and IH2. Both working great.
A sample page: http://old-pine-footwear.com/store/index.php?main_page=product_info&cPath=7_59&products_id=304&zenid=e01b1c5f1979fa827782eb2eeb15bb51
short URL http://1url.org/go/1y2f

Help getting this sorted out will be greatly appreciated.