So I ordered a new dedicated server and ended up having to setup WHM myself. It was doable until I came to nameservers section, which I think I messed up.

I was given 5 ips by my host, and I've bound them in (entering each ip + subnet of 255.255.255.0).

I didn't realize that each nameserver was supposed to get it's own ip and I used the same ip for both nameservers (and I didn't check the a records box).

How do I go back and reassign a new ip address for the 2nd nameserver, also does it matter that the default ip is the same ip I used for namserver 1?

so I have ips for example with 10.12.120.1 - 5 ( just an example )

I log in to http://10.12.120.1:2086 and
I assigned ns1.mydomain.com and ns2.mydomain.com to 10.12.120.1

Should I have assigned ns1.mydomain.com to 10.12.120.1 and ns2.mydomain.com to 10.12.120.2 ?

How do I go about fixing this, I'm a total newbie when it comes to WHM. I just got the server, also I probably need to enter the same ips in for my domain (it's on namecheap - i found the area for it I think).