PHP if statement sucking footer into wrapper

Hi,

This isn’t causing a problem at the moment (not unless it’s causing IE to screw up my sidebar which I’m still researching/investigating) but I noticed my footer was getting attached to my content wrapper whenever I was calling a page with a php if statement that calls a specific category of posts that are constructed in a different way to rest of my posts. For example, some of my posts are full on article/blog posts while others are just snippets of text and links. Here is my blog for to be clear.

I suspect it this snippet of code, so any help would be really appreciated.

<!-- loop -->

<?php if (have_posts()) :?>
<?php $postCount=0; ?>
<?php while (have_posts()) : the_post();?>
<?php $postCount++;?>

<?php if ( in_category('3') ) { ?>

<div class="mpartgeneral">
<?php the_content ('Read the rest of this entry &raquo;'); ?>

<div class="date"><?php the_date('d-m-Y') ?> </div>
</div>
 <?php } else { ?>

<div class="mpart">

<h1><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>"><?php the_title(); ?></a></h1>
<h2><?php the_author() ?> | Filed under <?php the_category(', ') ?></h2>

<?php the_content ('Read the rest of this entry &raquo;'); ?>
<? if (function_exists('social_bookmark')) { social_bookmark(); } ?> 

<div class="date"><?php comments_popup_link('Comment now »', '1 Comment »', '% Comments »', 'commentslink'); ?> . <?php the_date('d-m-Y') ?></div>

<br/>

<div class="commentsblock">
<?php comments_template(); ?>
</div>

<?php } ?>	

<?php endwhile; ?>

<?php else : ?>

<h3>
Not Found
</h3>

<strong>Sorry, but you are looking for something that isn't here.</strong>

<?php endif; ?>

<!-- end loop -->