Yeah I agree and I liken it to the corner clearance which is only 11" for the Jotul F45 I am considering. Thanks for your input. I think I am overthinking the whole thing.Code is a funny thing. Your installation manual trumps code so the NFPA rules are not an issue.
In my eye, I would liken that post to a sidewall parallel to the stove side. You have a loading door that requires a pretty big side clearance on that side due to the door, like 16" as I recall. The face of post is over 16" from the side of that stove if I read your drawing correctly.
So instead of a post, image a wall parallel to the side of the stove at that same offset. It appears to meet spec.