The excerpt getting posted twice – Loop problem

Hello Im having a problem with the loop, just starting with wordpress. Basically I am trying to post the exerpt on the main news page and then post the full content when I click into the single post.

I was trying to do this.

if (single_post)
post content
else post
the excerpt

Here is my code below

<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

 <?php if ( is_single() ) { ?>

                    <div class="post">
						<?php the_content(); ?>
					</div>
 <?php } else { ?>

 <?php } ?>

 <div class="post">
   <?php the_excerpt(); ?>
<a href="<?php the_permalink(); ?>" title="Read the rest of <?php the_title(); ?>" class="more-link">Read more ?</a>
 </div>
<br /><br />

 <?php endwhile; ?>

 <?php endif; ?>

The problem that I am having is that when I click into a single post, its posts the full post (like I want it to) but then it adds in the excerpt of that post as well. Any help with this would be greatly appreciated.