So, let me just gather my thoughts for a moment.
AAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHH!
Okay, now that that's out of the way, let's get right into the theories/predictions.
So, I think that Nene's lifespan has not been switched out with Aoi's because of that protection charm Teru gave her. That will prevent her from being sacrificed meaning that Nene's lifespan is still significantly shortened. At least, that's what I think anyways.
Let me know if I sound like a psychic or an absolute idiot. Thanks for listening to my Ted Talk!