Navigation Issue

I am having problems getting my navigation bar to scroll down properly. Right now, the scroll down is in a box with all three pages in it, instead of putting each page below the next. The site is http://www.bankruptcylawfirmalabama.com and it is the navigational tab “Office Locations”, the drop down shows the three pages altogether instead of a vertical dropdown. How do I correct this in the code? Any help would be greatly appreciated.