Is it normal to have so many DNS NS entries on a Virtual Server?

[calport]

The method outlined here might be a better way to configure your domains for Virtualmin:

Ignorance regarding Name Servers

My hostname for the Virtualmin server is vps01.indiax.com and the name servers I use are dns1.indiax.com and dns2.indiax.com. I use my domain registrar’s control panel to point vps01, dns1 and dns2 to the ip address of the server on which I have installed Virtualmin. In Virtualmin on vps01.indiax.com I create a virtual server named vps01.indiax.com (but disable mail) and use it as the default website for the server. I apply for SSL certificates using Let’s Encrypt and then use the ‘Copy to Webm…

The DNS records for a virtual server then would look like:

@	IN	SOA	dns1.indiax.com. root.dns1.indiax.com. (
			1558993438
			10800
			3600
			604800
			38400 )
@	IN	NS	dns1.indiax.com.
@	IN	NS	dns2.indiax.com.
calport.com.	IN	A	13.233.12.13
www.calport.com.	IN	A	13.233.12.13
ftp.calport.com.	IN	A	13.233.12.13
m.calport.com.	IN	A	13.233.12.13
localhost.calport.com.	IN	A	127.0.0.1
calport.com.	IN	TXT	"v=spf1 a mx include:amazonses.com ip4:13.233.12.13 ip4:13.235.160.222 -all"
@	IN	CAA	0 issuewild letsencrypt.org
mail.calport.com.	IN	A	13.235.160.222
calport.com.	IN	MX	5 mail.calport.com.