Craig,
I'm glad to hear there are no phones orphaned in NR 200. It means your subnets are all accounted for in the network map.
As for remapping your subnets to Network Region 200? Respectfully, I disagree with that course of action, as it will cause you to have to re-examine the relationships between other network regions. Relationships, that I assume are working well as they are.
Your DHCP scope quite rightfully is instructing your phones to register to the PROCR address. If you list trace RAS (consult help for exact syntax) you'll see this is the case. A fresh phone that has never registered to your environment has no knowledge of the existence of the CLAN boards until it has successfully registered to the PROCR gatekeeper. Once this has happened, and only when it has happened, does the phone learn about the CLAN boards (unless your DHCP scope is referencing a list of gatekeeper addresses, of course). At this point the IP-network map is consulted and two things happen. The phone is mapped to IP-Network region 1, and upon discovering available gatekeepers in IP-Network-Region 1, its registration is moved to one of the available CLANs within that region. Had there been no available CLAN board within network region 1, the phone would still be mapped to NR1, but it's gatekeeper would remain the PROCR address.
You can prove this behavior by changing translations on the IP-interface screen. Tell the CLANs that they're no longer eligible to accept h.323 registrations. At this point, the phones will seek an alternate gatekeeper and find only PROCR available to them. It's intrusive.
I have 1 PROCR address and dozens of network regions, about 7500 sets and absolutely no C-LAN boards. You don't need them. Removing the CLAN boards and calling it a day poses the least risk due to administrative change.
Good luck.