Yes Queue manager notifications are not available in Standard edition. That means that you are not getting an email for lost calls in the Queue since only the queue manager is receiving this and not the individual extensions/agents of the Queue.
Now for the RG, if the option to send email on missed call is enabled in all extensions of the RG, then all extensions will be notified and since you have the same email address in all extensions you will receive one email per extension. I'm afraid this is the normal behavior and cannot be avoided considering your configuration.