Items on Drop ship PO not in the same order as the SO

We are on 12.1.3 and we are noticing that when the drop ship PO gets created from the SO , the items on the PO are not in the same order as on the SO.Eg Item A on SO would be line#1 but the same item A will appear as Line#2 on the PO.Is there a way to ensure thatt he lines on teh PO are in the same order as that on the SO from which it is created

thanks

rahul