Well, now this is dumb. And maybe something the devs should be made aware of.
Somehow, by some horrible miracle, my box enumerated two disks as /dev/sdg/.
I have no idea how, but I caught this after looking over the pool once more. So I shut down the box, disconnected all disks, waited for the thing to power drain, and then spun it back up and the disk enumerated correctly. I am leaning HBA glitch but who knows.
I have been working with Linux for nearly 20 years now and I have never once seen that so anyone’s guess is valid.
Also, go figure I sort this out as soon as I post to the forums. C’est la vie.