submenu not working

the submenu function in menu is not working. every time I save all the submenus become top menus. This started yesterday after I moved my WordPress install from a subdirectory to the root. Everything else is cleaned up properly. All links are clean. I can delete the menu. I can create a new menu. But if I try to move a menu to be a submenu, the subordination is when I save. site is us-covered-bonds.com