On my Happenings page (in Preview), I list all the categories and allow the user to search by category. For each Happening event, I set a primary category and then a field for additional categories (see below) as tags. For this event (for example), it will only show up on the Theater page; not on Holidays, Kids, Other, or Downtown.
Currently, if they click on an icon on the Happenings page (like Downtown), nothing shows up even though I've added it as an Additional Category on some posts like the one above. I'm guessing the reason it's only showing by the main Category is because it doesn't know to look in Additional Categories. Is there a way for me to make this happen?