Results not look like as expected

Hey!

Awesome plugin.

I just have a problem. I1ve attached two shots about the AJAX result. One of how is it working and one of how it should have. Could somebody help me please?

Thanks,
David

Functions code:

<?php
add_filter('uwpqsf_result_tempt', 'customize_output', '', 4);
function customize_output($results , $arg, $id, $getdata ){
	 // The Query
            $apiclass = new uwpqsfprocess();
             $query = new WP_Query( $arg );
		ob_start();	$result = '';
			// The Loop

		if ( $query->have_posts() ) {
			while ( $query->have_posts() ) {
				$query->the_post();global $post;
                                echo  ' <div class="col-md-6 col-lg-4">
    <div class="job-preview" style="background-attachment: fixed; background-size: contain; background-position: top center; background:
    linear-gradient(
      rgba(0, 21, 37, 0.6), rgba(0, 39, 68, 0.3)
    ), url('.the_post_thumbnail_url("custom-size", ["class" => "img-responsive responsive--full"]).')">
        <a href="'.the_permalink().'">
            <h2 class="post-title">
                '.the_title().'
            </h2>
        </a>
        <p><strong> <i class="fa fa-map-marker fa-fw" style="color: #fff;"></i>
                                '.the_field("helyszin").'</strong>
        </p>
        <div class="">
            <span><strong> <i class="fa fa-money fa-fw" style="color: #fff;"></i>
                                '.the_field("oraber").'Ft/óra </strong>
                            </span>
            <span><strong> <i class="fa fa-clock-o fa-fw" style="color: #fff;"></i>
                                '.the_field("munkaido").'</strong>
                            </span>
            <a class="btn btn-navy btn-block text-uppercase text-white" href="'.the_permalink().'">Részletek</a>
        </div>
    </div>
</div>';
			}
                        echo  $apiclass->ajax_pagination($arg['paged'],$query->max_num_pages, 4, $id, $getdata);
		 } else {
					 echo  'no post found';
				}
				/* Restore original Post Data */
				wp_reset_postdata();

		$results = ob_get_clean();		
			return $results;
}
?>