Hi Kristi,
You are limited in what can be changed from doing a Relist through Auctiva (if you've checked that capability). However, you have full flexibility to change description section using Relist on ebay.
I'd first get that section correct using the one-page lister on Auctiva and then cut-and-paste the HTML code with that Auctiva feature to ebay's editor (use HTML there). I've done it many times to replace the whooooole thing for a Relist. You'll need to delete the old parts to replace with new. Make sure you don't delete your Scrolling Window (if that's important). Use the PREVIEW on ebay's lister to make sure you've got it right.
Hope that suggestion helps.
Danno