When a node belongs to multiple clusters (output of one cluster, input to another), it currently does not visually represent this shared membership.
As of now, adding a node to a new cluster appears to overwrite its previous cluster assignment on the UI, rather than showing it as a member of both.

Creation of Cluster 1

Creation of Cluster 2

Instead it should look something like this (screenshot from van Bekkum et al, 2021)