hi, this question has been asked many times but i couldn't find a definitive answer when searching through this board and others.

currently i cant set name servers in whm because the "Sorry, the nameserver ns1.mydomain.com already has the ip X.X.X.X assigned to it."

so i bypassed this by sshing in and changing the the /etc/nameserverips.

question 1:
is this ok? to bypass whm and do it manually?

question 2:
if i want to reuse an IP for a nameserver do i add the entry like this:
ipnumber1=ns1.domain.com
ipnumber2=ns2.domain.com
ipnumber1=ns1.otherdomain.com
ipnumber2=ns2.otherdomain.com

or like this?
ipnumber1=ns1.domain.com,ns1otherdomain.com
ipnumber2=ns2.domain.com,ns1otherdomain.com

thanks in advance