Agreed.
If you really think about it, why did he have a misaligned scope on in the first place? The shooting distance was not far. Another researcher has an excellent analysis of scope use and how it makes it very difficult to follow a moving target using one, even harder to use aiming the down at an extreme downward angle.
My take? It was there as all part of the ruse to make it look like Crazy Oswald - supposedly expert shooter - used a [misaligned] scope to get the job done.