In-Portal allows administrator to create a content pages to be shown later on on site (as CMS usually do).
To prevent access to a new pages in development, that content isn't fully completed administrator can set page's status to Disabled to prevent site visitors from seeing it anywhere.
However administrator will be able to access that page anyway using direct link (small shortcut icon after page name in page list) from admin console.
There is a bug, that results in displaying "home-page" sub-menu on a disabled page instead of proper sub-menu, that is visible when page is enabled.
This becomes even bigger problem, since 0001050 task (in 5.2.0) allows administrator to provide access to a disabled page for other users with the help of special link, that has access code build-in.