All our boxes updated from cpanel and now have this box ticked in tweak settings: "When adding a new domain, if the domain is already registered, ignore the configured nameservers, and set the NS line to the authoritative (registered) ones." We did not ask for this to be done. Can anyone guess what the problem might be with that box being ticked? Answer: If someone adds a new domain to the server that is currently hosted elsewhere, the current name servers get added to the SOA records on our server. Then once the customer has changed the name servers to our ones, the domain still points to their old host. This is a total nightmare. It seems to have been like this on most servers for several days. We didn't change it so cpanel must have done it during an update. Fortunately we use our own DNS for a lot of the servers but the reseller ones are now badly misconfigured on many domains and it will take a week to go through them and sort them out. Why would anyone think that having that box ticked would be a good thing? Why would anyone want to auto update that on all the servers?