You have recently added your domain name in your package as an external domain. Currently, you have not yet made the necessary DNS changes with your registrar. This is the reason you are getting "DNS Settings Incomplete with Registrar" as the domain status in the 1&1 Control Panel.
To resolve this issue, you need to contact your registrar and ask them to point the domain name servers to us. After this is done, it will take around 24 to 48 hours until your new name servers are propagated and your domain to be ready in our system.