sag-um-cluster template is not quite working correctly

[kfam-marcink]

Hi, I have uploaded modified 3nodes cluster to Command Central and started the layer creation. The template installed the UM products and created the instances but didn't create the cluster.
There are also some issues with the instances created, since all of them had the same name. Though that it's impossible to open the realms in the Enterprise Manager nor to create a cluster.
The template I used you can find below:

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alias: sag-um-cluster
description: Universal Messaging realm server

environments:
  default:
    nodes:               ${}
    um.numrealmserver.license.key: "*_NUMWF_10.*_*_*" # UM license key
    um.instance.name:    tstUMCluster1015            # server instance name
    um.cluster:          cluster
    um.instance.port:    9000               # main listener port number
    um.jmx.port:         9999               # jmx port number
    um.memory.init:      128                 # initial memory size in MB
    um.memory.max:       512                # maximum memory size in MB
    um.memory.direct:    1G                 # direct memory size
    um.fixes:            ALL                # minimal recommended set of fixes to apply

layers: 
  runtime:
    productRepo: ${repo.product}
    fixRepo:     ${repo.fix}
    templates:
     # - um-server
      - um-cluster-${runtime.nodes.count}

templates:
   um-cluster-3:
    description: Cluster configuration for 3 node cluster
    products:
      NUMRealmServer:
        ${um.instance.name}:
          runtimeComponentId: Universal-Messaging-${instance.name} 
          configuration:
            Universal-Messaging-${instance.name}:
              COMMON-CLUSTER:                       
                COMMON-CLUSTER:  
                  Name: ${um.cluster}
                  Servers:                                      
                    Server:
                      - "@name": ${runtime.nodes[1]}
                        URL: "nsp://${runtime.hosts[1]}:${um.instance.port}"
                      - "@name": ${runtime.nodes[2]}
                        URL: "nsp://${runtime.hosts[2]}:${um.instance.port}"
                      - "@name": ${runtime.nodes[3]}
                        URL: "nsp://${runtime.hosts[3]}:${um.instance.port}"

provision:
  default:
    runtime: ${nodes}

I expect the script should create three nodes ie like in this example tstum-1, tstum-2, tst-um3 and a cluster with tstum-1, tstum-2, tstum-3 nodes in it, which for now it doesn't do.