When I view the page and the menu item mentioned I can see the submenu, then when I hover over certain elements there I can see the next level menu. From what I can see it looks like the second level sub menus items have a small gap between them and the first level sub menu items.
When I looked at the css I was able to make the gap disappear by setting adjusting the left setting for the ul#cssmw1 ul.level-2, I changed it from 111px to be 109px. Here is the setting:
menu.css (line 120)
ul#cssmw1 ul.level-2 {
left:109px;
}
Is this is issue you are seeing on your end, if not please explain a little more about the problem and what browser you are viewing this in.