Now, if the world is really probabilistic on a quantum level you may be right, since this could be a genuinely random element, but I've never been able to get my head around quantum physics.
This is what I was pondering as well. Maybe one of our resident physicists can chime in here with some more detail on quantum level aspects of how things operate. But from a holistic level, this leads me back to the whole nature of quantum physics, randomness and most importantly, uncertainty.
If one universe is replicated from another in its entirety, then this actually opens up a whole can of worms with regards to
how one can achieve that knowing that the Heisenberg principle would need to apply; i.e. the actual nature of the particles at the quantum level is not certain. This is why I brought up entanglement. If there is a way to replicate the particles and entangle them exactly, then I suppose you
could argue that the two universes could then be inexorably linked. Thereby having them progress identically and at the same rate.
Ultimately, the actual physics of this is beyond me. Anyone have a hotline to Stephen Hawking's cell phone?