It would be great if we could add custom help pages via ACP.
Not the main point of your thread I know but my template edit does add a link in the left menu, as well as the main content on the right.2. The newly added page isn't using the Help template with the page selections in the left side bar. The title for Help pages is left justified over that sidebar and so things look ok. When new pages are added, there is no left side bar, so things appear differently.