http://www.gametracker.com/server_info/xtr3.me:7797/

Exact same domain, and all I had to do was add the server again, nothing else would get the DNS to update (although it had updated fine for my other 2 servers).

DNS change happened almost exactly a week previous to this post (6 days 23 hours 30 mins), and previous changes didn't cause any issue with GT, but this one simply refused to update the one server.

In the process, this deleted the previous xtr3.me:7797 and all it's stats, would be nice if I could get the stats migrated to the new one, but I can't do it myself since the old one shows up as deleted (and they're on the same URL anyway).

"We resolve the DNS name daily. If this server stops responding to stats requests, then we resolve the DNS name more frequently."

As you're well aware, DNS does not propagate the entire globe instantaneously. It can take up to 24-48 hours for other systems to detect a change if you have that bad of a DNS provider.