Why Does the Notification Count Differ from the Number of Showings?
While you are notified about each showing and can review them in the Notification Center, the Listing Activity Report will contain the complete information. When you navigate to it from the side menu and click on your listing you can use the Activity Tab to see a full list of appointments.
You can remove one or all of the notifications and will be able to review your appointments on the Listing Activity Report at any time.