Issue
Why is the PO line total (LNAM) with a Status 99 still accounted for in the net order value (NTAM) ? 


Resolution

That is standard M3 functionality.

The line has been flagged as complete (in this example the supplier will not deliver the quantity requested) bringing the line status to 99. Purchase order line amounts of the PO lines with a status 99 will not be deducted from the order amount.
PPS201 will always show what was originally ordered, this is for Purchase Order tracking and auditing purposes.

If you go to PPS600 you will see that you have the functionality to not include status 99 lines in the Output.