Spoke with member. He is in the registered category that has access to the forum. He is able to see the posts he made. He made a new test post that I received an email on showing the post. However, when I go there, I, admin, cannot see his post and the site shows me that he has no posts.
I'm not ignoring him. I'm not ignoring anyone. Permissions in the node for this person/usergroup is also correct. No addons or customization that would be involved. Note I can see all other members' posts.