To be fair, I was suggesting that the older Jon is the time displaced one XD
It's a solution that can't last forever because, as you said, one of them is an anomaly. But if it's anything like when the original five X-Men were suddenly sharing time with displaced versions of themselves (one of the few modern-ish Bendis ideas that actually ended up being pretty okay...mostly because of other writers) then it's something that could at the very least get people a few more years with whichever Jon they want before one of them eventually has to go away.
And, much like the O5, it'd be interesting as hell to see how Jon that experience results in Jon growing up to actually be different from his older self.