Hi JH
I am pretty sure this is normal, I see it in my own SnapProtect impelementations when doing backup copy jobs (to tape) and also when doing restores.
It seems that SnapProtect needs to register the VM, modify some settings in the VMX file, un-register it, and re-register it again several times before it's ready to be used by ESX. It usually takes a few minutes.
If you are curious about what it's doing there might be some more info in the vsbkp.log files on the Media Agent (C:\Program Files\NetApp\SnapProtect\Logs).