doesn't make sense at all
It doesn't make sense when the father changes the past 2 hours after a conversation that the future (or the now) changes not until after those same two hours (after the last conversation).
Example: when the father saves the kid in the fire, the whole future gets altered, including the murder of his wife (which happens a week after the fire).
In the now, the wife is instantly dead (the mother vanishes instantly although she should have been alive for 7 more days until the murderer kills her in the past)So either the now should be altered at the exact moment where the son gives a prediction to the father or all the events in the now should only alter parallel to the timeline in the past (which would prevent any possibility to predict of course)
I don't know how to express myself better, but hope you still get what I try to point out...
Apart from that I liked the movie btw... 6/10