Compare this results to PO Line Items with date Range, you will know what is added manually
SELECT T1.[ItemCode], T1.[Dscription], T1.[Quantity] as "PO Qty", T2.[Initial], T2.[InitialOrg], T2.[InStock], T2.[OutStock], T2.[Final] FROM [dbo].[POR1] T1, MSN2 T2 WHERE T2.[ItemCode] = T1.[ItemCode]