to rule out Unisphere getting "confused" , have you tried to restart management server.
We recently upgrade the FLARE OS of a CX4-120 to Release 30.  From Unisphere, Hosts under the Hosts tab, we find that one of the ESX Server appears twice (i.e. there are two entries with the same Host Name and IP address).  One is OS = unknown, Status is "Inactive" WHILE the other one is OS = VMWare and Status is "Active".  Besies, when we list virtual machines on that ESX Host, we find that Virtual Machines are resided on the ESX Host marked as "Inactive".  There is nothing on the one marked as "Active".  On the other hand, connectivity status is the same for both entries.  Your advice is sought.
Same Host appears twice in Unisphere ?