Moving Average Price

Hi

We have an issue with the GI posting related to the Plant Maintenance Work Orders.

We have a process where we post Goods Receipts (101) and Reversals (102) on PO documents. Our process for the Goods issue (261) and (262) does not refer to the PO document as it refers to the work order. By doing this we have abnormal price increase occurs on the moving average price of the material.

NOTE: Our Plant Maintenance process do not use Standard Pricing

Has the above stated issue ever occurred? If so please state the method we should be following so that we have the right Moving average price for the material..