When you are looking at any campaign and scroll to the bottom under Summary, the stats shown are all-time stats. This is especially important for ongoing campaigns like birthday campaigns that have been ongoing for a very long time. If you filter by different date ranges, the stats like Push Notifications Sent and Emails Sent will remain the same in the Summary as they are for all time.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)