As a followup to my post, here are the settings and disk from my original template:
From here, I convert to template and deploy from template. Select standard cluster settings, etc, and at the final step I click to apply customization. I have a completely default sysprep for the setup with nothing that could be causing this from the configuration.
After the initial clone - no disk is showing still: Logged in real to take screenshot.
Finish going through all of the vmware image customization etc, sign back in. Still looks the same. No point in posting the same image a third time.
So I guess it must be CommVault somehow doing this during backup process with snapshots or something. I will update when I find out more.