I appreciate the input here and agree that there is an upside to allowing multiple genres. The downside is that it can ’dilute’ the accuracy of search results and matching generally. 

One workaround which is currently functional is to include the names of any other similar genres in the long description under the About section of your story page. Our search algorithm parses this text and so if you make references to multiple genres in the description it should show up in search results.