What must not have been updated?
Yes, No.
It's in the check in process at the kiosk at the airport. When you select that you are going to check bags, it asks how many, then you have to hit update, the system does the calculation and gives you a total. It's not a new screen though, it's been there for at least the last 5 years. Unless this change is within the last 10 days since I flew on SW.