Search Results not Precise? not working?

My search results are not working. When I type a title of a post the results will show it far down on the list and it seems that all results are being shown instead of just the one I type. It used to be working. I added a limitation to the search by category as well.

get_header(); ?>
<?php
if( is_search() )  :
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
query_posts("s=$s&paged=$paged&cat=13");
endif;
?>

	<div id="content" class="narrowcolumn">

	<?php if (have_posts()) : ?>

		<h2 class="pagetitle">Search Results</h2>

		<div class="navigation">
			<div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
			<div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
		</div>

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

			<div <?php post_class() ?>>
				<h3 id="post-<?php the_ID(); ?>"><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h3>
				<small><?php the_time('l, F jS, Y') ?></small>

				<p class="postmetadata"><?php the_tags('Tags: ', ', ', '<br />'); ?> Posted in <?php the_category(', ') ?> | <?php edit_post_link('Edit', '', ' | '); ?>  <?php comments_popup_link('No Comments »', '1 Comment »', '% Comments »'); ?></p>
			</div>

		<?php endwhile; ?>

		<div class="navigation">
			<div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
			<div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
		</div>

	<?php else : ?>

		<h2 class="center">No posts found. Try a different search?</h2>
		<?php get_search_form(); ?>

	<?php endif; ?>

	</div>

<?php get_footer(); ?>