Hi,
When I select ‘Same as billing address’ in the shipping details section of the Checkout page the billing data I entered is not carried across.
On your Blanco WPEC demo site when ‘Same as billing address’ is selected a background task (ajax/js?) runs to populate the shipping fields with the billing data. This does not happen on my site, nothing seems to run to copy the data to the shipping fields.
I tested this in both Firefox and Chrome browsers and it fails in both.
The site can be access as per the details in the private content section.
Regards, Mike.