Template (Seite) wird immer wieder zerschossen

<?php get_header(); ?>
<div id="content" class="narrowcolumn">
<!-- This sets the $curauth variable -->
<?php
if(isset($_GET['author_name'])) :
$curauth = get_userdatabylogin($author_name);
else :
$curauth = get_userdata(intval($author));
endif;
?>
<h2>about: <?php echo $curauth->nickname; ?></h2>
<dl>
<dt>Website</dt>
<dd><a href="<?php echo $curauth->user_url; ?>"><?php echo $curauth->user_url; ?></a></dd>
<dt>Profile</dt>
<dd><?php echo $curauth->user_description; ?></dd>
</dl>
<h2>Posts by <?php echo $curauth->nickname; ?>:</h2>
<ul>
<!-- The Loop -->
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<li>
<a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>">
<?php the_title(); ?></a>, 
<?php the_time('d M Y'); ?> in <?php the_category('&');?>
</li>
<?php endwhile; else: ?>
<p><?php _e('No posts by this author.'); ?></p>
<?php endif; ?>
<!-- End Loop -->
</ul>
</div>
<?php get_sidebar(); ?>
<?php get_footer(); ?>

<?php get_header(); ?>
<div id="c_content">
<div id="post_entry">
<?php if (have_posts()) : ?><?php while (have_posts()) : the_post(); ?>
<div class="post_meta" id="post-<?php the_ID(); ?>">
<div class="post_top"></div>
<div class="post_index">
<div class="post_title">
<div class="calendar">
<p class="date"><?php the_time('j'); ?></p>
<p class="month"><?php the_time('M'); ?></p>
</div>
<div class="post_info">
<h1><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title(); ?>"><?php the_title(); ?></a></h1>
          <span class="author">erstellt von 
          <?php the_author_posts_link(); ?>
          &nbsp; 
          <?php edit_post_link(__(' bearbeiten'), '|', ''); ?>
          </span> <span class="category">ver&ouml;ffentlicht unter
          <?php the_category(', ') ?>
          </span></div>
</div>
<div class="post_content">
<?php the_excerpt(','); ?>
        <p><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"> 
          weiter lesen...</a></p>
</div>
<div class="post_comment_counter">
<div class="coms_count"><a href="<?php comments_link(); ?>"><?php comments_number('Gib Deinen Senf hinzu','1 Kommentar','% Kommentare'); ?></a></div>
</div>
</div>
<div class="post_bottom"></div>
</div>
<div class="clear_content"></div>
<?php endwhile; ?>
<div class="post_nav"><?php if(function_exists('wp_pagenavi')): ?> <?php wp_pagenavi(); ?><?php else : ?><?php posts_nav_link(); ?>
<?php endif; ?></div>
<?php else: ?>
<h3>The Archives Had Been Deleted...</h3>
<?php endif; ?>
</div>
<?php get_sidebar(); ?>
<?php get_footer(); ?>