I just added 2 dimmer switches on a 3-way circuit which work fine. But why does DR Table A show up 3 times?

It’s a bug in 6.0.0. Reboot eISY and they’ll go away.

It's in my house, the duplicate nodes are a problem with devices beyond just insteon. I have seen duplicate nodes on new hue devices, new yolink devices, and I even see a scene that keeps coming back after I delete it. I even thought I have rebooted my eisy, but I will try again.

i saw issue with mixture of Insteon and other plugin devices. All corrected by reboots after the device was added.