Discount on Sales Order

Discount on Sales Order

On a sales order when a line item is discounted the total for that line item is not changed on the sales order but the grand total is correct.  If you print out this sales order you will see that the discount is not reflected in the line item and if you add up all the line items they will not match the Grand Total and the difference will be the amount of the discount.  Is it better to add a line item for a discount?