Diplay Custom Post Type archive

Hi I am running Vantage Premium and I have made a child theme with two custom post types.

for some reason the page thumbnail for the post type archive pages is narrower than the single page.

What did i do wrong.? What is the correct code to make a custom post type archive page?
(On a related note: I purchased premium but my purchase code is not recognized now, can you please confirm my purchase, I posted here before)

Here is the code I used:

<?php
/**
* Template for tours archives
*/

get_header(); ?>

Tours

'tours', 'posts_per_page' => 20 );
$loop = new WP_Query( $args );

while ( $loop->have_posts() ) : $loop->the_post(); ?>

<a href="" title="" rel="bookmark">

<?php echo '';
the_excerpt();
echo '';
endwhile;

?>

URL: http://darknessdarkness.com/nightskye2015/tours/

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URL: http://darknessdarkness.com/nightskye2015/