Two columns show only two posts

I have done two loops with different categories. The first loop shows the first category and the second loop shows the second category.

Each loop is a <div>

But I have a problem. The loops only show two posts. When there are more posts, the loop creates another <div> like the loop limit was two posts.

What’s wrong?

The code:

<div id="content">
            <?php $theme->hook('content_before'); ?>

		<?php
                $is_post_wrap = 0;
		query_posts('category_name="Left Column"');
                    if (have_posts()) : while (have_posts()) : the_post();

                    $is_post_wrap++;
                        if($is_post_wrap == '1') {
                            ?><div style='width:300px;float:left;border:1px solid #BEBEBE;'><?php
                        }
                        get_template_part('post-columns', 'homepage');

                        if($is_post_wrap == '2') {
                            $is_post_wrap = 0;
                            ?></div><?php
                        }

                endwhile;

                else :
                    get_template_part('post', 'noresults');
                endif; 

                    if($is_post_wrap == '1') {
                        ?></div><?php
                    } 

                $is_post_wrap = 0;
		query_posts('category_name="Right Column"');
                    if (have_posts()) : while (have_posts()) : the_post();

                    $is_post_wrap++;
                        if($is_post_wrap == '1') {
                            ?><div style='width:300px;float:left;border:1px solid orange;'><?php
                        }
                        get_template_part('post-columns', 'homepage');

                        if($is_post_wrap == '2') {
                            $is_post_wrap = 0;
                            ?></div><?php
                        }

                endwhile;

                else :
                    get_template_part('post', 'noresults');
                endif; 

                    if($is_post_wrap == '1') {
                        ?></div><?php
                    } 

                get_template_part('navigation');
            ?>