Currently the KDS will show all orders even the ones already expedited to the customer. Example
I put in an appetizer for the customer of an order of Bruschetta. On the KDS the kitchen will touch the screen to say its ready and it is removed. 10 minutes later I place their main course and the KDS will show the Bruschetta (with a check mark) and the rest of the order. When a kitchen is busy you are now asking the kitchen to make sure they look for a check mark. This needs to be resolved where the item does not show up if it has already been fired to the kitchen.