Delete NS manually

So, I was messing around with NS's and figured I'd see if something weird would work right (which it does), but I wish to go back to the standard nsX format.

Now, when I try to delete the NS I get this error.

"The domains 36.211.3.saturn.dynamitehosting.com and 36.220.100.saturn.dynamitehosting.com don't match"

I've manually removed the DNS entries, I just need them to disappear from DA. What config do I need to edit?

Thank you,
Scott.

nvm, got it working by adding another 2 on the same "domain" and deleting.

I think it should be possible to delete one at a time, though.