I want to start by saying that I don't have any interest in changing your mind. I just wanted to explain why I didn't share your belief in that account of this incident. So my question to you now is this: why is it important to you that I believe it? Why do you care? I think we would agree that Ueshiba O'Sensei was an unparalleled martial artist. We would probably also agree that Aikido is the ultimate martial art (for us). So what if I don't believe Ueshiba O'Sensei dodged bullets? I believe in his teachings, in his art and in his example. Isn't that all that matters?
PS: you asked who has studied the unreliability of eyewitness accounts. I refer you to http://faculty.washington.edu/eloftus/
for the definitive expert on the matter.