Its as bad as if I used cage instead of cave. I expect someone who professes knowledge on a subject to spell it correctly. That's not a typo. Its beyond careless. Ordinance is a wholly different thing than ordnance. The other thing is if he was "nicer" to me, I'd be more forgiving. You know me. I wouldn't even mention it, though I saw it. Its the difference between giving someone benefit of the doubt, or doubt of the benefit. He gets the doubt.

Where you used its wrong in three places, was it just a typo or careless?