It looks like the 1 result you’re seeing is just the 1 of those 4 that matches your query.
Edit: or, actually, a more likely problem: there’s a setting you can turn on in your site that makes the browse pages (which includes search results) only show results that are attached on a “page”, the exhibit-type user-editable pages. If you’ve turned that setting on, it would explain this issue. The setting is “Restrict browse to attached items” and you’ll find it in the “Browse” section of the site settings panel.