I went back and tested one of the new R190W routers that was serving 192.169.11.xxx address on the LAN side.
You are correct.
If our WAN with DHCP is connected to the router before it boots up, it causes the router to change its default LAN address from 192.168.11.xxx/24 to 192.169.11.xxx/24 and serve address within that Class C Octet.
We run a /16 subnet on our WAN. We also run all of our routers in the NAT mode.
What is the rational that the firmware in the routers are programmed to change their defaut IP addresses from 192.168.11.1 to 192.169.11.1?
I went back into the 4.3.3-R4 manual to see if I could find any reference telling us that the firmware is programmed to change the default LAN IP addresses, but didn't find any reference. Might that undesired "feature" documented anywhere else?