Design mit query_posts verhindert das ausführen weiter PHP Widgets

<?php


get_header();


?>


       <?php $post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
       <?php /* If this is a category archive */ if (is_category()) { ?>
       <?php if (in_category('wissen')) {?>
        <h1 class="pagetitle">Batterie und Akku <?php wp_title('', true, 'right'); ?></h1>
        <?php query_posts( 'posts_per_page=20'); ?>
        <?php } else {?>
        <h1 class="pagetitle"><?php wp_title('', true, 'right'); ?></h1>
        <?php } ?>
       <?php } ?>
       
      <div id="inhalt">
        <?php if (have_posts()) : ?>
          <? $post_counter = 0; ?>
          <?php while (have_posts()) : the_post(); ?>
            <? if($post_counter == 0) { ?>
              <div class="post" id="post-<?php the_ID(); ?>">
                <h2><a class="postHeading" href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h2>
                    <div class="entry">                
                  <?php the_excerpt(); ?> <a href="<?php the_permalink(); ?>" rel="nofollow" title="Permanenter Link zu <?php the_title(); ?>">...mehr zu <?php the_title(); ?></a> <?php edit_post_link('bearbeiten', '', ''); ?>
                    </div>
              </div>
              <? $post_counter++ ?>
            <? } else if($post_counter > 0) { ?>
               <div class="mini-post" id="post-<?php the_ID(); ?>">
                <h2><a class="postHeading" href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h2>
                    <div class="entry">                
                  <?php the_excerpt(); ?> <a href="<?php the_permalink(); ?>" rel="nofollow" title="Permanenter Link zu <?php the_title(); ?>">mehr ...</a> <?php edit_post_link('bearbeiten', '', ''); ?>
                    </div>
                  
              </div>


    
            <? if($post_counter % 2 == 0) { echo "<hr />"; } ?>
            <? $post_counter++ ?>
            <? } ?>
           <?php endwhile; ?>




        <?php else : ?>
          <h2 class="center">Not Found</h2>
          <p class="center">Sorry, but you are looking for something that isn't here.</p>
          <?php include (TEMPLATEPATH . "/searchform.php"); ?>
        <?php endif; ?>
      </div>
        </div>
<?php get_sidebar(); ?>


<?php get_footer(); ?>