Source:
maulthots
too rushed! episode way too rushed!why does he know this?the flashthe flash cwwas he still vibing somehow?WE'LL NEVER KNOW!anyway someone idk who was saying why are things different when barry goes back to the normal timelineand the answer is simplebarry kidnapped thawne for three monthsand this is the thawne who then went on to kill wells1so obviously some of his knowledge and decisions are different from that point onhence changes to the regular timelineAGAINbecause BARRY KEEPS MESSING WITH SHIT