eBay saved searches help

I’ve been getting emails recently for a search I saved a year or two ago. It wouldn’t be a problem, only the returns include a partial match of my search term. (i.e., it includes listings with an ‘e’ at the end of the word, which I don’t want.) The email includes a ‘Refine this search’ button. I click on that, and I get a page of search results. I go to My eBay and click on Saved Searches, thinking I could edit it there. This search is not in my saved searches! So how do I edit it?