我有一页有三段摘录。只有第一节摘录被分配到后课堂，而不是第二节或第三节。我推测我的PHP中有问题：

      <table width="100%" border="0" cellspacing="0" cellpadding="0" align="center">
       <tr>
        <td width="100%" valign="top"> 
         <div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
          <?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
           <h2><a href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>
          <?php the_excerpt(); ?>
          <p><?php the_time(\'F j, Y\'); ?> at <?php the_time(\'g:i a\'); ?> | <?php the_category(\', \'); ?> | 
          <?php comments_number(\'No comment\', \'1 comment\', \'% comments\'); ?></p>
         </div>
         <?php endwhile; else: ?>
         <h2>Oops...</h2>
         <p>Sorry, no posts we\'re found.</p>
         <?php endif; ?>
         <p align="center"><?php posts_nav_link(); ?></p>
        </td>
       </tr>
      </table>

<table width="100%" cellspacing="0" cellpadding="0" border="0" align="center">

<tbody>
    <tr>
        <td width="100%" valign="top">
            <div id="post-19" class="post-19 post type-post status-publish format-standard hentry category-printables">
                <h2>
                    <a href="myurl"></a>
                </h2>
                <p></p>
                <p></p>
            </div>
            <h2></h2>
            <p></p>
            <p></p>
            <h2></h2>
            <p></p>
            <p></p>
            <p align="center"></p>
        </td>
    </tr>
</tbody>

我如何确保post类应用于每一篇摘录，而不仅仅是第一篇？