Continuity mistake: After Evan beats Tommy to death on the college campus, it shows him kneeling over the body, and there is no blood on his collar. The shot changes to Kayleigh screaming, then back to Evan, in the same position, but now with blood splatter on his collar. He had already finished assaulting Tommy, so there shouldn't have been anymore blood spray. (01:09:25)
Continuity mistake: When Evan gets his first nosebleed, during the hypnosis session, the blood on his face changes quite a bit as shots change while the doctor is trying to wake him up. One shot shows two streams of blood, another shows only one, and yet another shows hardly any blood at all. (00:18:00)
Revealing mistake: In the first scene of the film, Evan is writing frantically in a journal and his last words that the camera zooms in on are "Save her". Look closely and you can see that those same words are already indented on the page as indicated by a visible letter "s" and "h" and a period that had already been written on the pad of paper. Obviously they had done some other takes. (00:01:35)
Answer: Yes Evan did write that single entry but this time he was at a disadvantage because in this new reality the younger him had already started the blame game of blaming himself and showing symptoms of being in trauma due to which he was institutionalized that same day the incident in the basement happened. Now about that single entry that he wrote before going to meet Kayleigh's dad, it is shown that in this particular reality as he did not maintain a proper journal after that, it got lost and everybody thought he never even started writing it before the basement incident happened leading to everyone believing there is no journal. This explanation is supported by an incident in the movie where the teenage Evan is making a journal at his attic right after his blackout with the blockbuster and Larry being admitted where he finds a box with his grandfather's death certificate and some weird photos in that attic. Later when he is institutionalized and asks for the journals from the doctor the doctor also tells him how his father kept asking for a photo album, suggesting his father also ended up in that institution by jumping realities and ending up in one where his photo got lost and he couldn't reach them anymore (the same photos Evan had found earlier in that attic). So his father got stuck in that institution and he didn't even have a of his birth like Evan did. Unlike his father, Evan got the video of his birth where he was able to stop himself from being born just like his two earlier brothers who reached the same conclusion and were shown in the movie as still births.
rupal