Hi,
Please check all the goods movements related to that material,ML will consider all the postings against that material.
Say, it will consider postings related to main cost object of Production order ( in this case ) and other cost objects like Cost center / WBS..etc.
While calculating Periodic unit price in ML, it will consider all single level and multi level differences.
Provide the Production Order cost trend screen and ckm3 for better under standing of the issue you are facing..
Regards,
Pavan Kumar Arvapally