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function wpc_order_post_type_archive( $query ) {
  if($query->is_main_query() && is_post_type_archive('success-stories' )){
 
		$query->set('posts_per_page', -1);
		$query->set('orderby', 'menu_order title');
		$query->set('order', 'ASC');
	}
}
add_action( 'pre_get_posts', 'wpc_order_post_type_archive' );