Some Dates Not Showing

I have a rather odd problem troubling me. Some dates just refuse to show. But it only happens once the post is kicked down to my “second loop”. I have the first post showing in all its glory then the next ten just as headlines, and it’s these that are causing me trouble. Here’s my code (without the html):

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

<?php $my_query = new WP_Query('showposts=1');
while ($my_query->have_posts()) : $my_query->the_post();
$do_not_duplicate = $post->ID; ?>
<div id="post-<?php the_ID(); ?>">
<?php the_title(); ?>
<?php the_date(); ?> <?php the_author(); ?>
<?php the_content('Read the rest of this entry &raquo;'); ?>
<?php the_category(', ') ?> <?php comments_popup_link('No Comments', '1 Comment', '% Comments'); ?>
</div>
<?php endwhile; ?>

<?php if (have_posts()) : while (have_posts()) : the_post();
if( $post->ID == $do_not_duplicate ) continue; update_post_caches($posts); ?>
<div id="post-<?php the_ID(); ?>">
<?php the_title(); ?>
<?php the_date(); ?> <?php the_category(', ') ?>
</div>
<?php endwhile; endif; ?>

If I’m allowed to link you can see the problem live here: https://www.simcitycentral.net/ Just scroll down a bit.