Reply To: Multisite option not working

http://www.used-camper-vans-for-sale.co.uk/wp-admin/edit.php?post_type=ad_listing&page=fields

http://www.used-camper-vans-for-sale.co.uk/wp-admin/edit.php?post_type=ad_listing&page=layouts&action=formbuilder&id=3&title=Adpost

Here are some links directly to the custom fields and form area.

I’ve also attached an example image for better understanding of the problem.

Thank you