It can be a real kick in the head when we come to these kind of realizations about timelines and such. I had a similar realization last year -- I had thought up to that point that the last perp was when I was 14. But then last year I remembered that he had just gotten the Fleetwood Mac Rumours album which came out in 1977, so that meant I was 16, not 14. For some reason, that seemed like a remarkably significant difference to me, even though he was in his 30s.
I hate this crap, too, particularly when moments like this come up. But the upside of this is that you're seeing it all with more clarity now than before, so that can help you make better sense of things and move forward with processing it.
P.S. I watched your 4 part video testimony this evening, and it was incredibly inspiring. I hope you realize how much inner strength you possess as a man.