Subzer011, I am seeing the same thing in my zfs list output:
tank/jails/.warden-template-pluginjail 772M 1.36T 772M none
tank/jails/.warden-template-pluginjail--x64 1.20G 1.36T 1.20G none
I would like to try the zfs inherit mountpoint command you mentioned. Could you please post back with the exact syntax you used?
Here's what I ended up doing and it is working for me.
zfs inherit mountpoint tank/jails/.warden-template-pluginjail
zfs inherit mountpoint tank/jails/.warden-template-pluginjail--x64
zfs inherit mountpoint tank/jails/.warden-template-standard
zfs list then showed those three had mountpoints. I rebooted my box to see if it would stick and it did.