Your SF changes per save when on route 3 because the positions of the RMNPCs are different per save. I'm not saying that it can't be the same like before but it mostly will be. I never had one time where I used another save and my SF was the same so I had to recalibrate every time. It's not much of a big deal though, my posts were continously misinterpreted because my real question or actually my theory was wether the SF would always be the same in RMNPCless area's which has already been confirmed, was a bit obvious too.