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Hello, can you describe the steps you get the bugs 2 and 3?

Yes, you can. After getting group value, you can sort sub-groups using a custom function, like this:

$group = get_post_meta( get_the_ID(), 'football_league_table_option', true );
usort( $group, function ( $a, $b ) {
    $score_a = $a['football_team_win_stat'];
    $score_b = $b['football_team_win_stat'];
    if ( $score_a == $score_b ) {
        return 0;
    }
    return ( $score_a > $score_b ) ? - 1 : 1;
} );
$counter = 0;
// other code

Hello, I've just added submitted post ID to the $config variable. Please update the plugin.

Hi, currently it's not possible. You can show/hide the whole field only 🙁

Oops, I've just fixed it in version 1.0.1. Please update.

No problem. Here is the code for registering relationships:

add_action( 'mb_relationships_init', function () {
	MB_Relationships_API::register( array(
		'id'   => 'posts_to_pages',
		'from' => 'post',
		'to'   => 'page',
	) );
	MB_Relationships_API::register( array(
		'id'   => 'posts_to_posts',
		'from' => 'post',
		'to'   => 'post',
	) );
} );

And here is the code to fetch connections (in index.php file):

global $wp_query;
MB_Relationships_API::each_connected( array(
	'id'       => 'posts_to_pages',
	'from'     => $wp_query->posts,
	'property' => 'connected_pages',
) );

MB_Relationships_API::each_connected( array(
	'id'       => 'posts_to_posts',
	'to'       => $wp_query->posts,
	'property' => 'connected_posts',
) );

Here is the code in the content.php file:

foreach ( $post->connected_pages as $post ) : setup_postdata( $post );
	the_title();
endforeach;
wp_reset_postdata();

echo '<hr>';

foreach ( $post->connected_posts as $post ) : setup_postdata( $post );
	the_title();
endforeach;
wp_reset_postdata();

We’ve just realized this problem and we’re working this.

PS: It's fixed in the version 1.2.2. Please update.