Hi my blogs homepage has a featured posts slide show, whilst ive discoverd how to add content to it the content being displayed is from posts that already appear on the homepage. But the demo of the theme shows none duplicated content.

So how do I add content to the slider that doesnt appear on the page also?

Heres a link to where I got the theme http://newwpthemes.com/wordpress-theme/newsmore/
Below is the code for the slider

Code:
<?php
if(get_theme_option('featured_posts') != '') {
?>
<script type="text/javascript">
	function startGallery() {
		var myGallery = new gallery($('myGallery'), {
			timed: true,
			delay: 6000,
			slideInfoZoneOpacity: 0.8,
			showCarousel: false 
		});
	}
	window.addEvent('domready', startGallery);
</script>
<div class="fullbox_excerpt">
	<div class="fullbox_content">
		<div class="smooth_gallery">
			<div id="myGallery">
				
				
				<?php
				$featured_posts_category = get_theme_option('featured_posts_category');
				
				if($featured_posts_category != '' && $featured_posts_category != '0') {
					global $post;

					 $featured_posts = get_posts("numberposts=5&&category=$featured_posts_category");
					 $i = 0;
					 foreach($featured_posts as $post) {
					 	setup_postdata($post);
                        if ( version_compare( $wp_version, '2.9', '>=' ) ) {
                            $slide_image_full = get_the_post_thumbnail($post->ID,'large', array('class' => 'full'));
                            $slide_image_thumbnail = get_the_post_thumbnail($post->ID,'large', array('class' => 'thumbnail'));
                        } else {
                            $get_slide_image = get_post_meta($post->ID, 'featured', true);
                            $slide_image_full = "<img src=\"$get_slide_image\" class=\"full\" alt=\"\" />";
                            $slide_image_thumbnail = "<img src=\"$get_slide_image\" class=\"thumbnail\" alt=\"\" />";
                        }
					 	
					  ?>
					  <div class="imageElement">
							<h3><?php the_title(); ?></h3>
							<?php the_excerpt(); ?>
							<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" class="open"></a> 
							<?php echo  $slide_image_full; ?>
							<?php echo  $slide_image_thumbnail; ?>
						</div>
					 <?php }
				} else {
					for($i = 1; $i <=5; $i++) {
						?>
							<div class="imageElement">
								<h3>This is featured post <?php echo $i; ?> title</h3>
								<p>The problem I'm having is that the featured slider is showing posts that are already being shown on the home page, how do I change this? 
In the themes demo it shows the featured slider displaying content that isnt already on the page, so I know it can be done.</p>
								<a href="#" title="This is featured post <?php echo $i; ?>" class="open"></a> 
								<img src="<?php bloginfo('template_directory'); ?>/jdgallery/slides/<?php echo $i; ?>.jpg" class="full" alt="" /> 
								<img src="<?php bloginfo('template_directory'); ?>/jdgallery/slides/<?php echo $i; ?>.jpg" class="thumbnail" alt="" /> 
							</div>
						<?php
					}
				}
				
				?>
			</div>
		</div>
	</div>
</div><?php } ?>
I'm currently using it on a local server so I dont have a link to give you to a live site.