I am having a problem creating a menu on my wordpress site. I am inputing 8 top-level menu items, each with several sub-menu items which I want to have appear as drop downs. This works fine for the first couple of menu/sub-menu lists but after I have input a certain number of menu items the menu stops behaving properly. Instead of dropping down from the top level menu item the sub-menus just appear on screen so that I have a ridiculous several lines of navigation buttons.
This happens no matter what theme I try using.