Problem von pages in den Kategorien

<?php get_header(); ?>


    <div id="content">


        <?php if (have_posts()) : ?>


        <?php $post = $posts[0]; /* Hack. Set $post so that the_date() work */ ?>
     
    <?php /* If this is a category archive */ if (is_category()) { ?>                
        <h1><?php echo single_cat_title(); ?></h1>
        
       <?php /* If this is a daily archive */ } elseif (is_day()) { ?>
        <h2 class="pagetitle">Tagesarchiv f&uuml;r den <?php the_time('j. F Y'); ?></h2>
        
      <?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
        <h2 class="pagetitle">Monatsarchiv f&uuml;r <?php the_time('F Y'); ?></h2>


        <?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
        <h2 class="pagetitle">Jahresarchiv f&uuml;r <?php the_time('Y'); ?></h2>
        
      <?php /* If this is a search */ } elseif (is_search()) { ?>
        <h2 class="pagetitle">Suchergebnisse</h2>
        
      <?php /* If this is an author archive */ } elseif (is_author()) { ?>
        <h2 class="pagetitle">Autoren Archiv</h2>


        <?php /* If this is a paged archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
        <h2 class="pagetitle">Blog Archiv</h2>


        <?php } ?>




    <ul class="artikel-liste">
        <?php while (have_posts()) : the_post(); ?>
          <li><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></li>
        <?php endwhile; ?>
    </ul>
    
    <?php wp_pagebar(array('before'=>'Seite: ', 'after'=>' ', 'tooltip'=>true, 'tooltip_text'=>'Seite'))?>
    
    <?php else : ?>


        <h1>Nicht gefunden.</h1>
        <?php include (TEMPLATEPATH . '/searchform.php'); ?>


    <?php endif; ?>
        
    
    <span id="artikel-10-neusten">Die 5 neusten Artikel</span>
    <ul>
    <?php mdv_recent_posts(); ?>
    </ul>
    
    <span id="artikel-10-besten">Die 5 beliebtesten Artikel</span>
    <ul>
    <?php if(function_exists('get_most_viewed')) { get_most_viewed(); } ?> 
    </ul>
    
    </div>


<?php get_sidebar(); ?>


<?php get_footer(); ?>