You are correct that the ship-to code and associated address information is being imported as you say. We are coming out with a new release shortly (in addition to the ptf you mentioned) and if possible, will try to incorporate a change for this.

Please note that the C1/C2 customer type will have no effect for shipping address information as these fields cannot be directly imported. Only the ship-to code can influence this info, and as you found, is not working as it should.

The AIP01013 ptf did not address anything with ship-to codes; the previous 000526 fixed a problem on entering the code on an invoice, but this is not import related.

Thank you for your concern in this.