Based on above page hierarchy, I suggest to move [Cluster of xx] to the same level as [Cluster] due to:
In [cluster of N] , we try to demonstrate information related to the cluster itself not the information belongs to cluster
One cluster can have many members that are in use. In the future, if there are 100 members that are using this cluster, we need to think about the scalability of this page. We might need to add search or pagination feature.

Suggestion:
1. Move the tab to the same level as Cluster
2. Text order
It is better to keep the same text order as the other pages (For eg Caches)