We create sales orders to pick orders.. then create an invoice from said sales orders. Yesterday two sales orders failed to be closed when the invoice was created - so the items are still allocated to those sales order. Any ideas ?
This could happen if your sales order was not converted to Invoice in full.
Say for example you ordered 5 of item 1 but only invoiced 3 of them, then 2 of them goes in backorder. Therefore the Sales order is not closed yet. In that case, your sales order will normally show this information under invoiced and back ordered colom.