Second NG Cluster is being deployed.
The same storage device with different mount point is supposed to be used with the new cluster.
When adding new cluster in OA, the NFS mount point is being attached to the first cluster, instead of new one.
Storage node is registered in OA and is linked to the webcluster upon cluster creation.
When new cluster uses the same IP address, OA uses node's IP address entered, finds that the node is already registered and simply add new mount point to it.
The issue is acknowledged as POA-113260.
Set up name resolution on MN and Web Server Nodes and use storage device's hostname to register the cluster.