Ah ... I'll bet that those rollingTier entries are responsible. And those are present in the linux vmware-vmx binary, so I suspect that it is something we have support for but no GUI as yet.
I also suspect that if you remove them, the behavior will cease.
Yes, the rollingTier entries are the "Autoprotect" implementation. It's used in Workstation for automatic snapshots while in record/replay mode, but the implementation is the same as for Fusion.
We don't say something is "supported" until it is hooked up into the UI 