Some of our employees have been booking an appointment on the front end so they can see what all is available but rather than completing the transaction with paypal they only click the button then switch the appointment from pending to completed on the backend. Payment is then ran through our POS system rather than paypal.
What is happening is the email confirmations are getting more and more delayed. The last one they booked this way the confirmation took 2 days to come through where as a normal completed booking with paypal being used (no backend editing) come through almost immediately! I've contacted our email hosting company and there is nothing showing an outage or delay in our email system (as other emails are working fine).