While creating an invoice in SD the accounting documents were not being released. This was due to an error of cost estimate. After investigation we found that the "Future" cost estimate was not maintained in "MM02". Therefore we created and marked the cost estimate so that it appears as "Future" cost estimate in MM02.
After two days while doing outbound deliveries from SD the cost estimate was somehow released from transaction VL02 and a price change document was posted.
Also before we had created the cost estimate the material price in system had fallen.
Please comment as to why the price change document was posted with a certain amount?
Need urgent comments and advices on what to do next?