Updated DNS servers at registrar for site.
Waited 24 hours.
Checked site. Lo and behold, new DNS entry has taken effect.
Worked on new site.
Took a break.
Went back to site.
DNS entry has reverted to old site. Everything set properly at registrar.
Apparently there was a rollback, and not the good kind, like at WalMart.
Slave to the Server