[Plugin: SEO SearchTerms Tagging 2] Wrong keywords !

edit : curious ! i use this code to display similaires post by tag :

<?php
//for use in the loop, list 5 post titles related to first tag on current post
$tags = wp_get_post_tags($post->ID);
if ($tags) {

  $first_tag = $tags[0]->term_id;
  $args=array(
    'tag__in' => array($first_tag),
    'post__not_in' => array($post->ID),
    'showposts'=>10,
    'caller_get_posts'=>1
   );
  $my_query = new WP_Query($args);
  if( $my_query->have_posts() ) {
  echo '<div class="lire_aussi"><h5>Articles similaires</h5><ul>';
    while ($my_query->have_posts()) : $my_query->the_post(); ?>
      <li><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></li>
      <?php
    endwhile;
	echo '</ul></div>';
  }

}

?>

so if i add the shortcode before this code it display the correct keywords, but if i add it after the code it display wrong keywords !

resolved by using this code :

https://wordpress.pastebin.com/uKDWTwkN