The system takes its lead time from a purchase order as a whole, this has its limitations as very rarely everything on a purchase order arrives at once.
A much better solution would be an added column to the purchase order that could be either all set as 1 date or changed for each item
Neil McQuillan
This requires Cloud POS to have line level due dates on purchase orders, this is a planned feature for Cloud POS and when that is completed this system will be amended to support that.