Something very similar happened to me at the range today. I was experimenting with a very strong grip--3 knuckles--to see how it would affect distance (hitting a 9-iron). Divot was going right, ball going left. Obviously, my swing path was I/O, but my face was so closed due to my grip that ball actually went left. Way left with the additional hook spin. It took me a few swings to put it together in my head, since I was certain that direction was controlled by path. It still seems confusing.

Got so out of synch the rest of the practice session was hopeless.