Thanks, but that is what I did to begin with.
The horizontal menu first and it is working fine, then I placed my cursor where I wanted the vertical 2nd level menu and created the menu. When I finished, it did insert the vertical menu, but it also altered the horizontal menu, so it became vertical too. Does the menu builder use the SAME files on each page? If you have 2 different menus, how does the menu builder differentiate between the two menus?