Nameserver bug

I found a bug when you go to add a new domain to your account and it says change it to:
Then if you add a domain which hasn’t changed it’s name servers to that yet you get a message saying that we didn’t find your website and you need to change your nameservers to:
and so on…
So I just wan’t this to be fixed because I got confused by this and didn’t know which one to change it to and other new people might get confused as well. I think the bit differs depending on what subdomain you use.

You can use and or Or both. It doesn’t matter, they all work.