2 query posts in rows

<?php
/*
Template Name: Multi Query Page
*/
?>

<?php
get_header(); ?>

		<div id="container">
			<div id="content" role="main">


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

				<div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
					<?php if ( is_front_page() ) { ?>
						<h2 class="entry-title"><?php the_title(); ?></h2>
					<?php } else { ?>
						<h1 class="entry-title"><?php the_title(); ?></h1>
					<?php } ?>

					<div class="entry-content">
						<?php the_content(); ?>
						<?php wp_link_pages( array( 'before' => '<div class="page-link">' . __( 'Pages:', 'twentyten' ), 'after' => '</div>' ) ); ?>
						<?php edit_post_link( __( 'Edit', 'twentyten' ), '<span class="edit-link">', '</span>' ); ?>

<?/*php comments_template( '', true ); */?>

</div><!-- .entry-content -->
				</div><!-- #post-## -->


<?php endwhile; // end of the loop. ?>

<div>

<h3><a name="category3">Category 3</a></h3>

<?php
// Show a selected number of posts per row
$posts_per_row = 2;
$posts_per_page = 4;
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array(
   'posts_per_page' => $posts_per_page,
   'paged' => $paged,);

query_posts( array(      'posts_per_page' => 4,      'cat' => '3',     'paged' => ( get_query_var('paged') ? get_query_var('paged') : 1 ), ));

if (have_posts()) {
   while (have_posts()) {
      the_post();

if ((++$post_counter % $posts_per_row) == 1  || $posts_per_row == 1) {
         if ($post_counter > 1) {
            echo "</div><!-- End of post_row -->\n";  // End previous row
         }
         echo "<div class='post_row'>\n";  // Start a new row
      }
      echo "<div class='post_class'>\n";  // Start one post


// Output post data here

echo '<h2>';the_title() ;echo '</h2>';

echo  the_post_thumbnail('thumbnail');

      the_excerpt();

      echo "</div><!-- End of post_class -->\n";  // End of post
   } ?>
   </div><!-- End of post_row -->
   <div class='clear'></div>

<?php } else {
   // Code for no posts found
}
?>

<h3><a name="category4">Category 4</a></h3>

<?php
// Show a selected number of posts per row
$posts_per_row = 2;
$posts_per_page = 4;
$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array(
   'posts_per_page' => $posts_per_page,
   'paged' => $paged,);

query_posts( array(      'posts_per_page' => 4,      'cat' => '4',     'paged' => ( get_query_var('paged') ? get_query_var('paged') : 1 ), ));


if (have_posts()) {
   while (have_posts()) {
      the_post();
      if ((++$post_counter % $posts_per_row) == 1  || $posts_per_row == 1) {
         if ($post_counter > 1) {
            echo "</div><!-- End of post_row -->\n";  // End previous row
         }
         echo "<div class='post_row'>\n";  // Start a new row
      }
      echo "<div class='post_class'>\n";  // Start one post

// Output post data here

echo '<h2>';the_title() ;echo '</h2>';

echo  the_post_thumbnail('thumbnail');

the_excerpt();


echo "</div><!-- End of post_class -->\n";  // End of post
   } ?>

</div><!-- End of post_row -->


 <div class='clear'></div>


<?php } else {
   // Code for no posts found
}
?>

</div>



</div><!-- #container -->

<?php get_sidebar(); ?>

<?php get_footer(); ?>