Are you seeing this in your horizon.log on the service-va by chance?
/opt/vmware/horizon/horizoninstance/logs/horizon.log 05 Aug 2013 13:17:16,855 [com.vmware.horizon.common.utils.Messages] (tomcat-http--9) (de06febe093c829:(de06febe093c829:10.1.1.176)) WARN: No such key 401 05 Aug 2013 13:17:16,858 [com.vmware.horizon.common.utils.Messages] (tomcat-http--9) (de06febe093c829:(de06febe093c829:10.1.1.176)) WARN: No such key Cannot create organization as it already exists horizon.log lines 1032-1073/1073 (END)
If you re-import the OVA to a different datastore does that make any difference?
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