I see you have 6 menu write menu.css files linked in... you should clean up your head to only include one copy of that file. Then update the css in that file manually to correct the problems:
1) menu.css line 46, update padding to:
padding: 5px 0;
then
menu.css line 42, add:
height:27px;
then
menu.css line 113 remove:
height: 18px;
2) menu.css, add to the style:
margin-top: -1px;