DHCP leases not persistant after restart

There are no other routers in the network.  The cable modem is a Netgear CM1100.  The IP 192.168.1.250 has the same MAC address as the other IP 192.168.0.27 that the Orbi Satellite is using.  It's just bad behavior, some static backup IP configured on the satellite.  It just sits there arping for all the IPs it used to know about before the restart of the Orbi router.  All the network clients ignore it since it's on the wrong network.  It just suggests to me the router/satellite combo doesn't fully reconfigure itself to the new network range.

I'm actually more concerned about the lack of DHCP lease persistance.  Every time I restart the router everything gets a new address (and yes it's the Orbi doing the DHCP).  Ironically I noticed it while reserving static IP addresses to avoid things like printers changing IP addresses.  I recall folks were having a problem with a particular doorbell and the solution was to give it a static IP.  DHCP servers need to remember the addresses they have already assigned when they restart or else there is chaos.