SOLVED Groups can no longer hold more than one member (Trunk 7825)
When I add a host to a group, (either via the host itself, or via the group list), the new host replaces the host(s) already in that group.
Adding does not work somehow.
Thanks. this seems to be my case
Here was another thread that contained the same issue:
I believe it was fixed in the latest revision update. @Tom-Elliott can correct me if I’m wrong.