Well guys, this poor dude seems hell-bent on dying on me.
This is one week later (I got it on Thurs). Watered on Saturday with 1/4 strength 20-10-20 Fert. The medium is still very damp after 4 days. I reached out to the seller who confirmed sphag, time release fert, and "a course bark pumice mix". Although but still very squishy.
This can be one of two things - stress or infection.
The spots are
possibly from spritzing it and causing a magnifying glass effect on some leaves but could also be something else.
This is a bit quick for going dormant so I cut the leaf off with a sterilized set of shears and dabbed with cinnamon.
Now it's just wait and see for the rest of the leaves.