Paypal Express + Billing Address

Hi All,

We have Paypal Express set up on a clients site, the button is there and takes the user to Paypal.

They log in, set a Shipping Address, this then goes back to CS-Cart. But instead of taking them to the postage page or checkout page, it takes them to the address page and asks for a Billing Address.

This seems like a completely pointless step? Why use paypal express if the user still has to fill in an address?

Further to this, when the customer already has a billing and shipping address in their account, it uses this over the one in Paypal when it shouldn't be doing so…

Any ideas?