WSUS not using 8531

I've configured WSUS clients on 2012R2 to use 8531/SSL to communicate to the upstream WSUS server. The summary screen for the client (below) says 8530, but in the registry itshttps://servername.blah.com:8531.

Network trace shows the server is using 8530, which is being blocked (only port 8531 was opened).  Any thoughts on how to correct the mis-configuration?

Thanks

Connection

  Type:   Local/SSL

  Port:     8530

  User Role:   Administrator

  Server version:   6.3.9600.16384