create-cluster made an exact copy of the config element named default-config and named it c1-config.
When the stand-alone instance was created, an exact copy of default-config was made and named ui1-config
When the clustered instance was made it simply referred to the cluster-config. No new config element was created.
When a second clustered instance is created the PORTS are overridden in the server element but the same config (c1-config) is used again.
At runtime in V3.1 we have to look at all the info in the config element for an instance AND all the info in the server element. The latter must override the former if applicable.