Hi merri,
....and welcome to the Community.
Revising the description section does take some finess. I've done it many times using the ebay Revise Listing method.
Can you provide a link to the active listing on ebay and the exact changes you want to make, and I or other experienced member can provide instructions or suggestions.
One quick tip is to use the Auctiva one-page lister to get the description exactly correct, then use the "Get HTML" icon on the Saved Listings page to cut and paste the code to the ebay Revise Listing editor. Use the ebay Revise Listing Preview to check the changes are correct before you submit the changes.
Danno