The issue happens due to the wrong date in keyed in at the Delivery Order.
To check which transaction is not reflecting you need to:
Go to Reports, Inventory Reports, Stock Card.
Filter all Period.
Click OK.
Take a screenshot.
Then filter again to the certain period that you want to be checked.
Click OK.
Compare with the earlier screenshot on which transaction is missing.
Fix the transaction with the wrong date.
Go to housekeeping and run data recovery.