960 Duplicate Devices

What Firmware version is currently loaded?
What is the Mfr and model# of the Internet Service Providers modem/ONT the NG router is connected too? 
Be sure your using a good quality LAN cable between the modem and router. CAT6A STP is recommended. 

How many RBS are deployed? 
What is the size of your home? Sq Ft? 
What is the distance between the router 📡 and satellite(s)🛰️? 30 feet or more is recommended in between RBR 📡 and RBS 🛰️ to begin with depending upon building materials when wired or wirelessly connected. 
https://kb.netgear.com/31029/Where-should-I-place-my-Orbi-satellite🛰

Has a power off for 1 minute then back ON with the ISP modem and router and satellite(s) been performed since last update?
Be sure to restart your network in this sequence:
Turn off and unplug modem.
Turn off router and computers.
Plug in and turn on modem. Wait 2 minutes for it to connect.
Turn on the router and wait 2 minutes for it to connect.
Turn on computers and rest of network.

Has a factory reset and setup from scratch been performed since last FW update? This would clear this up if you haven't tried it. You might set up with a wired PC and web browser first: https://kb.netgear.com/22697/How-do-I-install-my-NETGEAR-router-using-the-router-web-interface

say_xtr wrote:

I’m having issue with my internet currently and awaiting ISP to fix it. While waiting I check Orbi Apps and show my current Network Map. 


I notice there is new additional mesh unit appear in the network connected to my router. Upon checking the new mesh unit is actually has identical product details as my current router. It means the router now appears as ‘router’ and ‘mesh’ in the same network.

 

Why could this happen? Can this be the reason my internet is down?