your mixup does not make any sense: look at the 2 traces in question, on the left half both traces seem like a simple small vertical shift of the other, but in

your mixup does not make any sense: look at the 2 traces in question, on the left half both traces seem like a simple small vertical shift of the other, but in the right half of the same plot one plateaus earlier than the other, both plateauing at the same height. the conclusion is unmistakable: either the data is real and unexplained (or at least no agreement on any explanation yet) or the data was doctored by summing vertically displaced noise with horizontally displaced sigmoid.