Attached are a couple pictures of the tying joint.
It would very possible that much of it was a frame that was re-used and widened. But it seems odd that they would cut in half and reuse the sheathing on the back gable wall. I have added a picture of the back gable. Seems like it would have been easier to just move the boards up, rather than cut them in half and and add a middle section if they were widening the barn at the same time as moving it.
It does make it interesting to try to figure out what happened over the years.
