Sorting for custom field date time picker is not working

I have this custom post type webinars that has a custom field called ‘date-time’. I am trying to make it so that it shows the recent events for this show first. This is my query

	$query = array(
		'posts_per_page' =>18,
		'post_type' => 'webinars',
		'order' => 'DESC',
		'orderby' => 'meta_value',
		'meta_key' => 'date-time',
		'meta_type'      => 'DATETIME',
		'paged' => $paged
		
	);

But as you can see the dates are all over the place and doesn’t follow any order I understand. I’ve echoed the query on the page. Any idea what is going on?

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