exec-php plugin problems

i’m trying to use the exec-php plugin to show the most recent post at the bottom of the homepage here. but for some reason it screwing up the works. i created a test page here to show you what the page looks like without the plugin.

here’s the code i’m using at the bottom of the homepage to make the plugin run:

<h2>Latest Free Poker Mechanic Tip</h2>

<?php
$latestposts = get_posts('numberposts=1&category=1');
foreach($latestposts as $post) :
   setup_postdata($post);
?>
<h2><a href="<?php the_permalink(); ?>"><?php echo $post->post_title; ?></a></h2>
<?php the_content(); ?>
<?php endforeach; ?>

how do i fix it so that it looks right and shows the most recent post at the bottom of the homepage???