I think that was the way it worked at my university too, at least officially. Unofficially, very few teachers actually graded that way, and when I saw it happen

I think that was the way it worked at my university too, at least officially. Unofficially, very few teachers actually graded that way, and when I saw it happen, people complained about it a lot. Then again, the teachers that did it seemed like they were doing it punitively (e.g. subtracting the exact amount of points they were forced to add.)