Customer relationships bill to flag when creating customer during order entry

I expect we either have a setting we need to update, or I am misunderstanding something.   When creating a new sales order, and we select an established Sold To customer and create a new Ship To customer from within the sales order form, the relationship from the Ship To customer and Sold To customer automatically get the bill to and the ship to flags checked.   We believe we only want the ship to flag checked.   These are scenarios where the Sold To customer may be requesting we ship to THEIR customer.   We want to be able to ship to that