I think that a better way to test how user sees menu is to visit site not under admin user. Currently ‘front-end menu access’ add-on does not fire for front-end menu view when admin user visit a site. So when you visit site front-end as admin user, URE does not hide from you any menu items which should be hidden according your settings.
Do you think this logic is incorrect, inconvenient?
And, Yes, admin user always sees full menu at the menu editing page at admin back-end.
