Todd, in FS open the index screen for one of the people who is indexed, say Duke or Martha Radford. Click one of the Edit buttons. That gets you a form where you can describe the issue. It's not perfect, since you are 'editing' an index entry that doesn't have a problem. But you can use the Highlight feature to highlight the records omitted from the index, and explain in the text box.
You could also try the Feedback link at the very bottom of the page, but I don't think that allows you to show them the issue on the specific record image.