Pricing determination in copying control of billing
I've got an issue about pricing determination in copying control in billing. Below is my business scenario.
I have defined a new order type "ZOR" which was copied from SAP standard order type "OR".
(1), I created a sales order '100' with order type "OR", the sales price "PB00" is 6000 EUR.
(2), Then, I created a new sales order with order type "ZOR" which is reference with former order 100. The new sales order number is 200. Meanwhile, I changed the price "PB00' to 2900.
(3). I created a billing documents via sales order "200" with order type "ZOR". Here, I found the price in billing document, the price is still "6000", but actually, I have changed the price from original 6000 to 2900. How to do?
And I have never created sales and billing copying control between "OR" and billing type except "ZOR".
Please help me to analysis the situation. Many thanks.