Ntpd few issues
When you stop the service from the GUI, it doesn't stop the process.
When the service is running, it can't connect to the pool.ntp.org
I set mine to (see below) still didn't work.
Selecting multiple interfaces, enables listing on multiple interfaces. I can see that in the conf file the GUI creates.
Turning off the server portion will NOT stop the client. The client continues to run to sync the local system time even if it is not serving clients.