How do you know the Administrator account wouldn't have yielded more documents compared to a user account?
Regardless, imagine two independent people trying to murder someone. The first shoots a fatal bullet and the victim is about to imminently die, even if the best medical aid were to be immediately provided. Then the second murderer comes on the scene, does not realize that the victim is fatally wounded, and shoots another bullet, instantly killing him.
Both these people would be fully responsible for the murder, not just attempted murder. Arguments from them saying "no, the other killed him, I did not", do not fly in court.
But for your bank account comparison to make sense Manning would've already have emptied your bank account before JA broke the law.