Custom menu with twenty ten

Have a strange problem I simply cannot figure out. With this site – newhopeliteracy.org, the clients wanted the look of twentyten so I’ve done a child theme of that. The current menu is the default, alpha menu and every time I create a custom menu to change the order of parent / sub-menu items, the “about” category (which has 3 sub-menu items)shows all the sub-menu items whether hovered or not. I.E. they are visible and dropped into the main area all the time.

Has anyone hit this and found a way to fix it? Granted, I’ve played with a bunch of the CSS but can’t figure out why the ul ul a hover function seems to be so bolloxed up now.

Thanks for any ideas.