Hmmm..I think if I read that correctly..it sounds like the girl didn't really know much about horses and got intimidated by the big horse. Unfortunately, from what I read on Gittins website she would have to trade the horse back within a week of purchase.
Possibly she thought she was getting one over you guys, but fortunately you have issues with the horse and not intimidated by him. I would guess that is why she got defensive with you.
As far as the Coggins and who's name on it doesn't seem like a big deal. Unless she was untruthful about when and where she bought the horse.
But I agree with you...odd transaction. But you seen the horse for what he really is and taking someones word for it...good for you and glad your pleased with him!
I DON'T LEAD 'EM AND FEED 'EM, I RIDE 'EM AND SLIDE 'EM.