All our payments are processed via PayPal or Stripe. As a result all sales information is stored on their servers. We use a function called API that allows us to take that information from their servers and display it to you. This allows it to be secure and prevents even the payment processors from tampering with your data. You can thus rest assured that all information will be up to date and accurate.
Please note that this information is downloaded once every hour from their API via a cron, so you will have to wait until the hour passes to see the updated information.