Hi Thomas,
Sorry to disappoint you but mojoPortal's friendly url system does not support using arbitrary folder depth implied in the url. You should not enter extra / characters in the friendly urls. The system is not designed to reflect the site hierarchy in the url, in fact just the oppposite. By not reflecting the site hierarchy in the Url, it gives us freedom to move pages around in the hierarchy without ever breaking an Url. I recommend you use short urls that give an idea of the page content not its location. In a content management system like mojoPortal, pages don't really correspond to physical files with locations on disk. Pages are created dynamically from the database content.
Best,
Joe