Thank you! I have always looked at visitor posts by clicking Posts and then Visitor Posts. That works whether I'm signed on as the page administrator or if I'm not signed on at all. I've never clicked the Community tab either. I will look for a way to make visitor posts more visible, but for now I reordered the tabs on the left sidebar to make Community and Posts show at the top of the sidebar and added a post on the Facebook page explaining how to see visitor posts by clicking Posts -> Visitor Posts or Community.