Full width layout not working on any page

I added the full-width layout from the vantage theme to almost all of my pages but it’s not working on any of them.
When inspecting the page elements, it’s showing the full-container class going over the whole screen, but next is the content-area class and then the entry-content class, both only filling a small amount of the page. What am I doing wrong??

<div class="full-container">
<div id="primary" class="content-area">
    <div id="content" class="entry-content" role="main" style="margin-top:30px">
                    <div class="row">
              <em>  ......
                my page content..
                ...</em>
            </div><!-- row -->
        </div><!-- entry content -->
    </div><!-- content area -->  
</div>

this format is on all of my pages and I don’t understand why the content area and everything below is only on that small part of the page..

Thanks for your help!