Trying to build a one-page site with twitter bootstrap.

Link to live site is here

I have some questions regarding some problems.

1. My navigation is going out of the container. Why is that ? (See picture http://i45.tinypic.com/rr2mbm.png)

2. The navigation is going underneath this content, i have tried to use some z-index. But cant make it work. http://i49.tinypic.com/ru46iu.png

3. In chrome my parrallax effect is not working. Any idear why ?

4. I somehow get some margin/padding on the right side. Which is not so clearly on desktop, but on ipad it is seen clearly http://i50.tinypic.com/v7cn6h.png.