A problem I have recently observed a few times: people add DNS records to the wrong zone. For example, they add an a.b record to the example.com zone, but b.exa

A problem I have recently observed a few times: people add DNS records to the wrong zone. For example, they add an a.b record to the example.com zone, but b.example.com is its own zone. Bind doesn't complain about the extra records, but also doesn't return them, even if b.example.com is hosted on the same bind instance. (Which is technically correct, but sometimes confusing).