4 multiple loops

<div id="container" class="clearfix isotope">
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>


        <?php $my_query = new WP_Query('cat=3');?>

        <div class="element category-heading no-img y8" data-sort-brand="BRAND">

                <img src="<?php bloginfo('template_url'); ?>/img/tp.png" />

                <span class="centered">
                    <h2>Brand</h2>
                </span>

        </div>

        <?php while ($my_query->have_posts()) : $my_query->the_post();
        $do_not_duplicate = $post->ID; ?>

                <div class="element isotape-valueitem" data-sort-brand="BRAND:<?php the_time('YmdHi') ?>">

                    <div class="details y7a">
                        <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><h2><?php the_title(); ?></h2></a>
                    </div>

                    <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
                        <?php // If a featured image is specified display it otherwise display default transparent image
                            $url = get_template_directory_uri();
                            if(has_post_thumbnail()) {
                                the_post_thumbnail();
                            } else {
                                echo '<img src="' . $url . '/img/tp.png" />';
                            }
                         ?>
                    </a>
                </div>

        <?php endwhile; ?>

        <?php $print_query = new WP_Query('cat=5');?>

        <div class="element category-heading no-img y8" data-sort-print="PRINT">

            <img src="<?php bloginfo('template_url'); ?>/img/tp.png" />

            <span class="centered">
                <h2>Print</h2>
            </span>

        </div>


        <?php while ($print_query->have_posts()) : $print_query->the_post();
        $do_not_duplicate = $post->ID; ?>

                <div class="element isotape-valueitem" data-sort-print="PRINT:<?php the_time('YmdHi') ?>">

                    <div class="details y7a">
                        <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><h2><?php the_title(); ?></h2></a>
                    </div>

                    <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
                        <?php // If a featured image is specified display it otherwise display default transparent image
                            $url = get_template_directory_uri();
                            if(has_post_thumbnail()) {
                                the_post_thumbnail();
                            } else {
                                echo '<img src="' . $url . '/img/tp.png" />';
                            }
                         ?>
                    </a>
                </div>

        <?php endwhile; ?>

        <?php $digital_query = new WP_Query('cat=4');?>

        <div class="element category-heading no-img y8" data-sort-digital="DIGITAL">

                <img src="<?php bloginfo('template_url'); ?>/img/tp.png" />

                <span class="centered">
                    <h2>Digital</h2>
                </span>

            </div>

        <?php while ($digital_query->have_posts()) : $digital_query->the_post();
        $do_not_duplicate = $post->ID; ?>

                <div class="element isotape-valueitem" data-sort-digital="DIGITAL:<?php the_time('YmdHi') ?>">

                    <div class="details y7a">
                        <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><h2><?php the_title(); ?></h2></a>
                    </div>

                    <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
                        <?php // If a featured image is specified display it otherwise display default transparent image
                            $url = get_template_directory_uri();
                            if(has_post_thumbnail()) {
                                the_post_thumbnail();
                            } else {
                                echo '<img src="' . $url . '/img/tp.png" />';
                            }
                         ?>
                    </a>
                </div>

        <?php endwhile; ?>


        <?php $film_query = new WP_Query('cat=12');?>

        <div class="element category-heading no-img y8" data-sort-film="FILM">

                <img src="<?php bloginfo('template_url'); ?>/img/tp.png" />

                <span class="centered">
                    <h2>Film</h2>
                </span>

            </div>

        <?php while ($film_query->have_posts()) : $film_query->the_post();
        $do_not_duplicate = $post->ID; ?>

                <div class="element isotape-valueitem" data-sort-film="FILM:<?php the_time('YmdHi') ?>">

                    <div class="details y7a">
                        <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><h2><?php the_title(); ?></h2></a>
                    </div>

                    <a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>">
                        <?php // If a featured image is specified display it otherwise display default transparent image
                            $url = get_template_directory_uri();
                            if(has_post_thumbnail()) {
                                the_post_thumbnail();
                            } else {
                                echo '<img src="' . $url . '/img/tp.png" />';
                            }
                         ?>
                    </a>
                </div>

        <?php endwhile; ?>

<?php endwhile; else: ?>
<p><?php _e('Sorry, no posts matched your criteria.'); ?></p>
<?php endif; ?>
</div> <!-- /container -->