How are you actually creating your listings?
Typing them in using the eBid editor?
Pasting in HTML code using the source editor?
Copying and pasting in from another WYSIWYG editor?
Some other way?
If you are pasting in anything but actual HTML source then you could try the Paste From Word function of the WYSIWYG editor.
Attachment 14083
Using this (even if not pasting from Word) may clean up any errant code.
There aslo seems to be an email address ( mailto: ) within your listings. This is not allowed and eBid strips them out. That could break the code in some way.
You also have a link back to eBay on the Contact Seller link at the end of the description - again not allowed.