It is possible to create such a hierachy and the result would be navigation menu like this:
page 1 page 2 page 1.1 page 2.1 page 1.2 page 2.2
Ideally I would like page 1 and page 2 to be empty pages and when clicking on the menu page 1 to be directed to page 1.1. Is this possible? I noticed that in the Portal Admin Interface there is an option to set a page to the default page.