BuddyPress.org

I’m trying to override the default /_inc/global.js file with a custom one, but after deregister the original one, every post_update is run twice, so each post is duplicated.

I’m using

Wordpress version 4.3
buddypress version 2.3.3
typal-makewp005 Chld theme

In bp-custom.php:

function deregister_bp_scripts(){

wp_deregister_script( 'dtheme-ajax-js');
wp_dequeue_script( 'dtheme-ajax-js');
}
add_action('wp_enqueue_scripts', 'deregister_bp_scripts');

function mytheme_enqueue_scripts() {

			$params = array(
					'my_favs'           => __( 'My Favorites', 'buddypress' ),
					'accepted'          => __( 'Accepted', 'buddypress' ),
					'rejected'          => __( 'Rejected', 'buddypress' ),
					'show_all_comments' => __( 'Show all comments for this thread', 'buddypress' ),
					'show_x_comments'   => __( 'Show all %d comments', 'buddypress' ),
					'show_all'          => __( 'Show all', 'buddypress' ),
					'comments'          => __( 'comments', 'buddypress' ),
					'close'             => __( 'Close', 'buddypress' ),
					'view'              => __( 'View', 'buddypress' ),
					'mark_as_fav'       => __( 'Favorite', 'buddypress' ),
					'remove_fav'        => __( 'Remove Favorite', 'buddypress' ),
					'unsaved_changes'   => __( 'Your profile has unsaved changes. If you leave the page, the changes will be lost.', 'buddypress' ),
			);
wp_enqueue_script( 'custom_dtheme-ajax-js', get_stylesheet_directory_uri() . '/js/global.js', array( 'jquery' ) );
	wp_localize_script( 'custom_dtheme-ajax-js', 'BP_DTheme', $params );
}

add_action('wp_enqueue_scripts', 'mytheme_enqueue_scripts');

I already tried to set different priority , to move this code to functions.php instead of bp-custom.php, to use the twentyfifteen theme, to make a child of the bp-default theme, but no way…
What I need to do is to add some custom fileds to the activity form to create a facebook-like link-preview.

I followed this post in which they say you have to add to global.js the new fields’ values, but I don’t want to change the global.js file directly (for next updates)

https://buddypress.org/support/topic/adding-a-second-element-for-posting-with-an-activity/

Does anybody know what am I doing wrong?