Recently, we have had double billed customers through our Moneris eselectplus payment module.

Moneris explained that the both the double resulted from the generation of 2 transactions with 2 seperate order ids - however, we only have one order id in our system.

Anyone else have this experience or now what the root cause of this could be? Could it be that the customer pressed the back button prior to order completion or just after?

Thoughts?