I have been attempting to remove a repeating header on all of my webpages for customization purposes, but have been unsuccessful finding what is causing this header repeat. I came across this code in the header, and after researching it, I can not find what its purpose is. Could this be my culprit for the repeating patterns? If not, please point me to the right direction.

Here is the hmtl:

<!--container-->
<div id="container">

<div id="header">

<!--headerFst-->
<div class="headerFst">

and here it is in look.css:

 div.headerFst
{
    float:left;
    width:980px;
    padding-top:5px;
}

Thank you for viewing, and helping if possible.