A mistake is no more a sin than getting a gray hair is a sin, in my mind?
The other day, it took me 4 tries and 15 minutes to scan a paper correctly and send to my email. This is, surely, not a moral transgression?
I am sprinting. I trip. This is not a sin, surely. In heaven, I think there is a place for what we know as "mistakes." That is, because we are finite, although we intend something, we are not infinite, so it isn't always the case what we intend occurs. We intend not to trip. But we trip. We intend not to ever produce a typo while writing, but we do. Not because we are sinners! Because we are finite. Adam might have tripped. I'm throwing thoughts on the chalkboard here, stating nothing dogmatically. But I'm thinking: Adam saw a lion, as it were. he said, "Bear." Then, "No wait, Lion." Was that a mistake? Yes. He realized there was a better name for the creature, "Lion, "not "Bear." Was it a sin? Surely not, right? It's because he is finite that Adam mislabeled the "Lion" as "Bear" before realizing "Lion" was better than "Bear."
So perhaps it isn't connected to a theology of original sin. Personally, I would place "mistake," in the sense of, we intend one thing and that thing is different in execution than what we had intended, as a result of finitude that existed in the garden and will exist in paradise. The one catch: no mistake in heaven will ever be a sinful mistake. So we need two different categories of mistake.
One mistake that is a mistake and connected to sin + finitude, another mistake is a mistake and connected to perfect moral nature but + finitude.
These are my pillow thoughts on the issue I'm willing to be persuaded otherwise.