I'm not sure if you have enough VMotion for 10 hosts, but are you VMotion it hot or cold while VM is down? If you have issue with VMotion, try delete the VM from inventory, and then browse to the datastore->VM folder-> and right click on .vmx file and "add to inventory" to the cluster you want to see if it work that could be a workaround but required your VM to be down. Try to re-read your .lic file and restart license services to see if it clears it out.
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Regards,
Stefan Nguyen
VMware vExpert 2009
iGeek Systems Inc.
VMware, Citrix, Microsoft Consultant