DHCP DDNS zone issue

[lmkone]

Hi,

One of my interfaces is on 22 bit mask (10.1.8.1/22) that I have setup DHCP pool on (only a part of the subnet).
When I try to setup DDNS on it the generated config file seems wrong. I get a zone definition of:
zone 0-22.8.1.10.in-addr.arpa {
primary 10.1.8.1;
key ddns.test.main.local;
}

Should it not be: zone 8-11.1.10.in-addr.arpa ? Can anyone confirm please? How do I go about fixing this?

Thanks.

[lmkone]

Quick update, manually inserting (/etc/inc/services.inc):
zone 8-11.1.10.in-addr.arpa …
does not do the job, but:
zone 8.1.10.in-addr.arpa ...
zone 9.1.10.in-addr.arpa ...
zone 10.1.10.in-addr.arpa ...
zone 11.1.10.in-addr.arpa ...
does.

How do I go about fixing this the proper way (so I get update proof resolution)?