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on 3/1/18Forwarding to both consoles at the same time should not be a problem and is most likely unrelated to the double NAT messages. If the double NAT messages are coming from the consoles then you may not be double NAT'ed just single NAT. Consoles are not very good at detecting double NAT. If the double NAT messages are coming from our router detector then you definitely have a double NAT. If you are plugged directly into the ISP router then that's not usually the case. If you have a second router or WiFi access point that the consoles are connected to then that can be a problem.