Paypal Shipping address strange behaviour

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Originally Posted by DrByte

The $order->delivery address is the Shipping Address supplied.

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Thank you.
so I have figured out that if a customers address returned by PayPal in the Address State field returns GB and postal code the shipping address in my zencart adds the first GB state/couty in the database from zones . Hence the first GB zone on one site is Devon and another is Greater London.
Why this is happening I am not sure, strangely the Customers and Billing Address do not get changed or altered

@DrByte
So I have "fixed" this by allowing the first table zone in GB to have a blank zone. Which means that if the customer has entered in PayPal STATE GB postal code shipping returns a blank state.
If the customers have filled in their PayPal STATE correctly the Shipping address shows the STATE.
Why it was 'defaulting' to the first GB zone in the database I have no idea.