How to update the price based upon PGI date

Hi

        I have issue of updation of the Prices and freight based on PGI date in the billing we are using the two billing types for the excsies and tax invoice creation .And in the copy control pricing type is maintained Aas "C" for the billing types with single delivery but someHow MRP in the excise billing has been picked from the condition record thats validity is ended and in Tax invoice it picks up the correct prices

Both pricing condition types has pricing type "B" from Billing date and in the freight we have maintained as "A" SRD

But for the some cases specially for the excise related part that is based upon the MRP we are facing this issue

Pricing date is some how coming from sales document

Please find the problem details in the attachment