caption outside loop and how to not duplicate content?

Hi
I got theme,
Inside loop located usual content of pages posts ect. On a side of the page are i got 5 last post showing in each page outside the loop. i got 2 troubles:

1)Images in outside loop content doesn’t appears right. It doesn’t show usual frame around the images instead i see code something like [caption id="attachment_105" align="alignright" width="158" caption="car"] on a top of picture and [/caption] on a bottom
2) how to make, that the preview on a side wouldn’t duplicate post in the loop?
thank u
tha is the code which i’m using:

<div class="content">

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

			<div class="post_title" ><h1 class="storytitle"><a>" rel="bookmark"><?php the_title(); ?></a></h1>
 	</div> <!– close post title –>

	<div class="main_content">
					<?php the_content('Read more...'); ?>
				</div>
	<div>Date: <?php the_time('j F, Y'); ?>
</div>

		<?php endwhile; else: ?>
		<?php endif; ?>

	</div>
	<div style="float:left; width:23%; list-style:none; text-align:left; margin:20px 0 0 5%;">
	<?php

 $posts_new = get_posts('numberposts=5');
                foreach ($posts_new as $post_new) :
					echo '
<li><h3><a href="';
                    echo get_permalink($post_new->ID);
                    echo '">';
                    echo $post_new->post_title;
                    echo '</h3></li>
';
                    echo '<div class="post">';
					echo the_time('j F, Y');

                    if ( preg_match('/<!--more(.*?)?-->/', $post_new->post_content, $matches) )
                       list($post_new->post_content,$junk) = explode($matches[0], $post_new->post_content, 5);

                    echo $post_new->post_content;
                     echo '<a href="';
                    echo get_permalink($post_new->ID);
                    echo '">';
                    echo 'Read More...';
                    echo '';
                    echo '</div>';
                endforeach;
                ?>
				<?php
							wp_list_pages('include=175&title_li='); ?>
	</div>