Quote Originally Posted by Max_Killjoy View Post
This setting clearly has mythical magic, should we just be assuming that the hypothetical physics / logic of time travel even apply?
Exactly. There's every possibility that the flow of time as we 'expect' it to be doesn't even exist. Perhaps the reason Kat saved Annie is because she did - maybe what we are interpreting as a 'loop' is simply a fixed point in reality that has no beginning or end. Most importantly it probably doesn't matter - the story is going to explain things however it feels like doing and everyone's personal opinion on how time travel 'should' work isn't really going to matter.