When PayPal fails to give verification that an order payment has actually successfully been processed, the order in your web site is marked as unverified instead of having an order number.
You should log into your PayPal account and confirm that a payment was actually received. Once confirmed, log into your Custom Vantage Web site admin and click on the unverified order. To get a valid order number use the "select an action:" drop down to select the Receive Payment option and then click on the GO button. You can leave the payment type as cash and click on the Submit button. This will generate a valid order number. Next you can choose the Resend Admin Email from the actions drop down and send the completed order to your usual order email address.