Assurnet,
If these things were preordained by God because he knows the future then they should only be as predictable as Human behavior. They shouldn’t seem to follow set laws.
As for your second answer about the Mirror thing. Really? We are talking about Mitzius here; if it isn’t true you have one of two options
1.) you misunderstood what they meant i.e. they didn’t mean what you thought they meant (that a blood spot would appear)
2.)They were wrong.
To say that they where talking about a Mitzius that only applies to people on a certain Madreiga when they don’t indicate this themselves seems kind of silly