Weird... Yours shows one environment for "Now" and a different one for "On Reboot"... Looks to me like it is still pending a Reboot somehow...
First things first, get a copy of your configuration and save it somewhere other than FreeNAS (Like your computer): [System] - [General] - [Save Config]
Then Select/Highlight the one that shows "On Reboot" and see if you can "Activate" it.
If so, then have the system Reboot and see if everything is good.
If you can't "Activate" it, see if you can Select/Highlight the one that shows "Now" and "Activate" it (trying to get it to have just one show "On Reboot, Now"; like in my screenshot)
Worst case you may need to install a fresh version of FreeNAS and then restore your Configuration...Take a look at this thread: "
Upgrading to 9.10 Boot Mount Error"