Sub Page exclusions

add_action('genesis_entry_footer', 'shortcode_wp_pagelist');
    function shortcode_wp_pagelist() {
    if ( is_singular('page') ) {
echo do_shortcode('[pagelist sort_column="post_date" child_of="parent" class="page-list-cols-3"]');
       }
}

Hi

I’m using the above shortcode in a Genesis theme to output content at the foot of each page. However, there is a hiccup. If you go to the Page Matthew which is a sub page of the page Gospels it lists all sub-pages of the page Gospel.

If I go to Matthew 1 which is a sub-page of Matthew it lists the 28 pages of Matthew which is what I want to happen.

Is there another element I can add so that when I click on Matthew it lists the pages that Matthew 1 lists.

https://gucu.org.uk/2-the-new-testament/1-gospels/1-matthew/

https://gucu.org.uk/2-the-new-testament/1-gospels/1-matthew/matthew-1/

Thanks Rich

The page I need help with: [log in to see the link]