einige custom posts fehlen in der loop

function custPostLoop($aType) {
    
    global $post;
    $cnt = "";


    ob_start();
        
    while(have_posts()) :
        get_the_title();
    
    endwhile;
    
    rewind_posts();
    query_posts( array( 'post_type' => array($aType) ) );
    $nPosts = 0;
    while(have_posts()) :
        the_post();
        $nPosts++;
        echo '<div class="ght_posts_gallery">';
        
        ?>
        <a class="a_post_link" href="<?php the_permalink(); ?>" title="<?php the_title(); ?>" class="linked">
              </a>
        </div>
        <?php 
        
    endwhile;
    
    $cnt .= ob_get_contents();
    ob_end_clean();


    return $cnt;
    
}