Thank you for your quick response, Brian. The custom search forms I created are basically condensed versions of the Advanced "Template" Search, containing only specific fields from a template. I made these for users who wanted a faster way of searching on their templates.

When I built them in WebLink Designer, it asked me what templates and fields I wanted to use in the search form, so I figured as long as the field was indexed in the Admin Console, it would work the same way no matter where the field was being used. But it doesn't seem like that's the case.