Posts still visible

Then mark the post as hidden. See: https://rocketgeek.com/plugins/wp-members/docs/managing-content/restricting-posts/

Note that there is not a default option for hiding posts. There’s a technical reason for this, and that may change in the future, but for now, if you are marking a post/page as hidden, you need to do it at the individual post level. You can also do it in bulk on the Posts > All Posts page using the bulk action menu.