<div class="top-posts">
    <?php
    if (have_posts()) :
        while(have_posts()) : the_post();?>
            <div class="content">
                <?php the_post_thumbnail('archive'); ?>
                <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
            </div>
        <?php endwhile;?>
    <?php endif;?>
</div>

<div class="primary-posts">
    <?php
    if (have_posts()) :
        while(have_posts()) : the_post();?>
            <h2><a href="<?php the_permalink(); ?>" ><?php the_title(); ?></a></h2>
        <?php endwhile;?>
    <?php endif;?>
</div>

$cat_id = $wp_query->get_queried_object_id()

$args = array (
  'cat'            => $cat_id,
  'posts_per_page' => 2,
  )

$the_query = new WP_Query ($args);
if ($the_query->have_posts()) {
    while ( $the_query->have_posts() ) {
        $the_query->the_post();
        // display stuff
        }
    wp_reset_postdata(); // restore the original archive loop
    }

<?php
rewind_posts();
if (have_posts()) :
    while(have_posts()) : the_post();?>
        <h2><a href="<?php the_permalink(); ?>" ><?php the_title(); ?></a></h2>
    <?php endwhile;?>
<?php endif;?>