spindogs

This bit of code certainly seems to help things:

add_filter('request', 'hierarchical_post_fix');

function hierarchical_post_fix($args) {

	if (empty($args['post_type']) || $args['post_type'] != 'custom-post-type' || empty($args['name'])) {
		return $args;
	}

	$args['orderby'] = 'parent';
	$args['order'] = 'ASC';

	return $args;

}