Suggestions:
In customer master, If delivery to (customer code) is different than customer code for a particular customer. Then in Sales order delivery to (customer code) and the sold to customer codes will be different.
In customer master, ‘Delivery To’, is the customer to whom the delivery of the products is to be given, for the order. This can be used when the delivery address of the customer is different from the Sales and bill to.
Also ‘Bill To’ is customer code you want to bill for Sales of the customer. Useful when your customer code and bill to codes are not the same. This can be used when the billing address of the customer is different from the Sales and delivery address. Hence in Sales order, the system populates the delivery to value as given in customer master.