DNS problem

[directadmin.ru]

I create reseller with 2 IPs. These IPs are assigned automaatically (eg. 10.0.0.5 & 10.0.0.6)
But I need to assign second address from another class-C subnetwork.
1) I go to Admin Panel -> IP Manager -> choose 10.0.0.5 & 10.0.0.6 and click onto "Clear NS"
2) I choose 10.0.0.6 and click "Remove from reseller"
3) Add IP 10.1.1.6 to reseller's account


Then I go to Admin Panel -> DNS Administration -> domain.com and see
ns1 A 10.0.0.5
ns2 A 10.0.0.6

Why hasn't this entry been deleted from DNS, when I pressed "Clear NS"?

[DirectAdmin Support]

Hello,

The "Clear NS" button in the IP Manager only removes the text from the IP. It does not make any dns changes. They'd have to be removed using the Nameservers Screen (Reseller), or manually.

John