The trouble with the alerts, which I have been using for a couple of months now, is that they appear to send the message the second the aircraft enters the capture area and only shows whatever details are available at that time. Therefore, things like sqawk and flight number may not be available at first interrigation by RB. If this info is not delayed before the sending of the email perhaps that is something AirNav can think of for a future release. It may only be necessary to delay sending after rechecking for fuller details a minute or so after first contact.
Mike