Boostrap page layout overlap?

Hi guys,

I created a page this one below,

As you can see the grid system overlap.
The document says it is 960 but as you can see it overlaps.
So how to fix this?

Thank you very much in advanced.

Problem SOLVED.

I just removed the fluid codes.
from this,

<div class="row-fluid">

to this,

<div class="row">