Sonoff S31 Lite and another mystery

I got 2 of these to help build out my Zigbee mesh. Unfortunately, nothing will pair with them. I use “Add Devices via this device” and nothing ever pairs, it winds up pairing with the main controller without issue. The 2 S31’s seem to pair with each other without issue.
Another mystery is that another controller is showing in the visualization. A silicon labs EZSP. I believe that is the HUSBZB-1 that I was using before I got the Sonoff. I still use the HUSBZB-1 for Zwave, just dont know why the old one is still showing…