PageTemplate with Single Page entry & Several Categories

Hi, the page template code below used to work as I desired (even though it looks a little odd) – after an upgrade to 2.6 – it no longer works: I’ve checked the codex for deprecated code and think I need to use multiple loops and multiple queries – I’ve tried some but no luck:

So I need a page template which displays it’s own text, followed by all posts from 1, 2 or 3 categories.

Any help would be gratefully received.

<?php
/*
Template Name: exhibition
*/

get_header(); ?>

	<div id="bloque">
		<div id="noticias">

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

			<div class="entrada">
				<h2 id="post-<?php the_ID(); ?>"><?php the_title(); ?></h2>

			<?php the_content("Continue reading ".the_title('', '', false)."..."); ?>
			<?php edit_post_link('edit', '<p>', '</p>'); ?>
			<?php link_pages('<p><strong>Pages:</strong> ', '</p>', 'number'); ?>
			</div>
		<?php endwhile; endif; ?>
<h2>select portfolio</h2>

		<?php query_posts('cat=21'); ?>

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

		if ( in_category(21) ) { } else {
		?>

				<div class="entrada">
					<h3 id="post-<?php the_ID(); ?>"><?php the_title(); ?> &raquo; <a href="<?php the_permalink() ?>" rel="bookmark" title="permanent link to <?php the_title(); ?>">read article</a></h3>
					<small>posted by <?php the_author(); ?> on <?php the_time('F j, Y \a\t\ g:i a'); ?></small>

				<?php //the_content("more..."); ?>
				<?php the_excerpt(); ?>
				<?php edit_post_link('edit', '<p>', '</p>'); ?>
				<?php link_pages('<p><strong>pages:</strong> ', '</p>', 'number'); ?>
				</div>

				<?php } ?>

				<?php endwhile; endif; ?>

	<?php query_posts('cat=22'); ?>

	<?php if (have_posts()) : while (have_posts()) : the_post();  ?>
<h2>upcoming</h2>
<?php	if ( in_category(22) ) { } else {
	?>

			<div class="entrada">
				<h2 id="post-<?php the_ID(); ?>"><?php the_title(); ?> &raquo; <a href="<?php the_permalink() ?>" rel="bookmark" title="permanent link to <?php the_title(); ?>">read article</a></h2>
				<small>posted by <?php the_author(); ?> on <?php the_time('F j, Y \a\t\ g:i a'); ?></small>

			<?php //the_content("more..."); ?>
			<?php the_excerpt(); ?>
			<?php edit_post_link('edit', '<p>', '</p>'); ?>
			<?php link_pages('<p><strong>pages:</strong> ', '</p>', 'number'); ?>
			</div>

			<?php } ?>

			<?php endwhile; endif; ?>
</div>
<?php get_footer(); ?>