Looking good.
You need to create some space in the site for the fixed area as explained in item #4 of the thread below, or else the menu actually hides some of the content.
http://forum.weavertheme.com/discussion/10739/weaver-xtreme-tips-and-tutorials-part-4#Item_1
For the menu bar height, add the rule below in Main options > Menus > Extra Menu bar > Menu Bar BG CSS+ box
{padding:20px 0;}
if you want a different space above and below use
{padding-top:20px;padding-bottom:10px;}
with the value(s) that suit you