Scott Kichman, Mary Wasson,
Instead of using the Map Viewer, create a Web Application using Web AppBuilder. You will have a much better user experience (in my opinion, anyways). For example, here is a point that has several related table:
Click on one of the arrows displays the related records:
Clicking on one of the arrows again shows the attachments:
I can't say why the Files and Photos field is showing a 0, when there are attachments. Sounds like this may be a bug that I would recommend following up with Tech Support.