Custom Page of Posts template problem

This should be a really easy fix…

I created a custom page template using the code provided at under the ‘A Page of Posts’ heading. I succeeded in my goal of creating a page that only displays posts from one category but now the content is not floating next to the sidebar but pushed below it.

The URL is .
I am using the twenty-eleven theme.
The posts are published under the default post type.
And here is the code I copied and amended:

<?php
/*
Template Name: Page Of Posts
*/

/* if you are not using this in a child of Twenty Eleven,
*  you need to replicate the html structure of your own theme.
*/

get_header();
get_sidebar();
?>
<div id="primary">
  <div id="content" role="main">

  <?php
  /* the_post will retrieve the content of the new page you
  *  create to list the posts, e.g. as an intro to describe
  *  which posts are shown.
  */
  the_post(); 

  // Display content of page
  get_template_part( 'content', get_post_format() );
  wp_reset_postdata();

  $paged = (get_query_var('paged')) ? get_query_var('paged') : 1;

  $args = array(
	// Change these category SLUGS to suit your use.
	'category_name' => 'editions',
	'paged' => $paged
  );

  $list_of_posts = new WP_Query( $args ); 

  twentyeleven_content_nav( 'nav-above' );
  while ( $list_of_posts->have_posts() ): $list_of_posts->the_post();

    // Display content of posts
    get_template_part( 'content', get_post_format() );

  endwhile;
  twentyeleven_content_nav( 'nav-below' );
  ?>

  </div><!-- /#content -->
</div><!-- /#primary -->
<?php get_footer();

Please let me know if there is any more information I need to provide. I think this is a super easy fix but I’m new. Any help is deeply appreciated.