Time travel isn't really an easy thing to pick apart, especially since a person or creature going from lets say, today, to 200 years in the past would be a part of the future's timeline even though they or it is going back in time BEFORE they/it went back in time. Yea.

Yeah it’s never a totally easy thing, but we’re trying to keep the crazy-overlapping-shit to an understandable level.  I know right now it’s not all immediately apparent, but it should be a lot more apparent when M8 comes around, I hope.  If I can do a good enough job.