You have to exclude, reset device to factory defaults, include.
I don’t know. I didn’t watch you do the include.
Many people, myself included, don’t do secure pairing except on locks and access control devices (door/window sensors, etc) for security. Unless there is no way to avoid it, DO NOT pair S0 - it triples the Z-Wave traffic with the device.
The reason I do it that way is that the community driver Firmware Updater cannot update securely paired devices:
Nope. Repeaters just repeat. Z-Wave is backward compatible.