Continuity: When Evan tries to get his journals back from the bullies in the jail, the object that the guy on the bed is reading alternates from a closed copy of Hustler, to a journal and back several times.

Continuity: In the scene where Ashton Kutcher convinces his jail bunkmate that he is personally in touch with Jesus by using his journal to cause stigmata to appear on his hands, a stigmata mark can be seen in his right palm before he changes the past (just as he mumbles "tell me if you see anything weird").

Continuity: In the final shot of the hypnosis scene we see Evan from above. The blood on his shirt that was visible in the last shot has vanished.

Plot hole: When Evan is in jail with the religious prisoner trying to get him to help him get his journals back he goes to the scene where he is drawing that homicidal picture in kindergarten, but he gets up and puts the spikes that holds documents through his hands, creating a stigmata-style scar. The religious guy in the cell with him is so amazed because of this he thinks Evan is a prophet and he decides to help him. If Evan had gone back in time and got those scars on his hands, he would have changed the original timeline and would have arrived in jail with those scars the whole time. Some people try to correct this using the "If I can create scars, then can I fix them?" statement Evan made to defend the mistake and suggest he can create instant scars but he was using the word "scars" to refer to the negative events; not literal scars on his body. The scar he got when he burned himself in the past didn’t magically appear on him the moment he returned from the past; it became part of a new, slightly altered timeline (just like the scars on his hands should have been) and it let him know he can change history.

Continuity: When Evan shows up at Kayleigh's apartment, in the close-up she covers the plate with the newspaper. In the next shot from the doorway the newspaper, bottled water, etc., are positioned very differently.

Continuity: When Evan wakes up in a mental ward, after he killed Kaylee, the camera zooms around him in bed, which is in the middle of the room. When he gets up to get his journals, the bed is on the left side of the room against the wall.

Continuity: When Evan and his mom go to the psychic for a reading, the position of the money in the glass bowl differs depending on camera angle. (Director's cut)