Corrected entry: While Rachel and Jennings are escaping on the BMW, he asks her as they race through traffic "Was I any good on one of these?", and she says he was "OK". However, Jennings has been locked away for three years, unable to leave the facility, and bought the bike on eBay. Locked up like he was, he obviously hasn't been able to ride it on the streets before this, and didn't have a relationship with Rachel before this time (only meeting her at the party before the big paycheck offer).
Corrected entry: If Michael Jennings saw the future after he built the time machine, he would have only seen his fate with the FBI and whatever came after that. It would have been impossible for him to see himself get shot because a different future was created after he escaped from the room.
Correction: Exactly. By ensuring that a different future would occur, Jennings was able to see that new future in the time viewer. For example, immediately after he put the glasses and cigarettes into the envelope (or even after he thought of doing so), the time viewer would show him escaping the FBI room and what happened after. He had access to the viewer many times over the course of his research.
Corrected entry: After Jennings fixes the time machine, he goes up to the platform to activate it. He first presses several buttons with his right hand then places his hands on the proper spots. Next he clicks the buttons under his right fingers several times while activating the machine. If his memory of the machine was entirely erased, how does he know how to work it?
Correction: It was pointed out earlier in the movie that the memory erase for the three year period was a chemical process this time, not a physical one. Therefore, he will regain some memories of this period as time goes on. An action that he repeated frequently would be stored in his brain as conditioning, a type of memory that is very difficult to erase - the same way you still know how to ride a bike years later.
Corrected entry: When Affleck's character remembers his "death", which is of him falling off the catwalk, you can see that the person falling is a stunt person. That scene is shown twice, once when he was sleeping in the motel and the other time is when Jennings & Rachel use the machine again.
Correction: Similar to the entry about the missing bullet wound, this is also being taken literally at face value, remember this is an uncertain future. The face is fuzzy, I think it was deliberately done as a clue that he may not be the one to be killed. They probably could have done the effect with Ben suspended a couple feet off the floor and some blue/green screen work instead of a stunt double but used the double to add to the uncertainty.
Corrected entry: In the beginning of the film, they show a white hand that has all the lines of the hand labeled on it(like where someone's lifeline is), I'm not sure if this is a real line or not but I swear one said "guacamole line". Joke perhaps?
Correction: If you slow down the scanning of the white hand it says "quadrangle," not guacamole.
Corrected entry: Right at the start, when they wipe Jennings memory, you can see a woman put a bottle of champagne down and then Jennings and the woman have sex. But since this is exactly the order it actually happened, shouldn't that have been reversed in the memory wiping scene?
Correction: Not if the memory cells containing the earlier experiences were destroyed first. And you don't remember things backwards, do you?
Corrected entry: Wouldn't the access pass in the envelope be deactivated once Ben Affleck signed all the papers, leaving Allcom?
Correction: As a matter of good security practice, they would have deactivated the pass. However, once they realized he was going to try to re-enter the facility, they wanted him to get to the lab and fix the machine. Therefore, they would have reactivated the card to allow him to get into the lab (they also pulled the guards away so he could enter freely).
Corrected entry: When the "substitute" Doctor Porter is asked by Ben what is his favourite baseball team, surely his best friend Jimmy, who is telling her what to say, would let her know the correct answer thereby avoiding suspicion?
Correction: The "substitute" doesn't really needed to tell him this information. She already has the card and he was going to be killed, as she said "who cares?"
Corrected entry: When he moves the newspaper from the bottom of the bird cage to get the lottery ticket there are no bird droppings on the paper - unlikely as the birds have been in the cage for some time. If it was clean newspaper just put into the cage then someone else would have found the ticket.
Correction: The newspaper is cleaner than one would think, however, there is at least ONE bird dropping on the newspaper, right by his finger as he lifts it.
Corrected entry: Jennings says he could only move things into the delivery envelope addressed to himself if they were innocuous items cleared by security. Why would they allow him to export a security pass?
Correction: Jennings could only get innocent items out of facility security. His pass would have been a perfectly ordinary item for him to carry in and out of the building during his three year service. He obviously wasn't confined to the building during his stay. For the follow-up question of why he couldn't include a letter to himself in the envelope he substituted for the original, recall he got picked up by the FBI who went through his envelope. If he had communicated to himself; he'd have been communicating to them as well. It also seems likely that [don't know the character name] gave up on finding Jennings after he found the watch, even though he knew Jennings was alive. Jennings couldn't have recreated the machine without his partner, and they didn't have the machine intact. Also, since Jennings had beaten them all every step of the way with his foresight, he'd have arranged to have protected himself against further investigation. He, perhaps better than anybody else at the end understood that they were simply wasting their time - he had beaten them before they even began.
Corrected entry: When Ben Affleck is figuring out where he sabotaged the machine, he says there are only two things left in the envelope: the bullet and the crossword puzzle. Why didn't he consider the watch on his wrist? He had no idea what it did, and it hadn't triggered yet.
Correction: Mike already assumes that the watch has been 'used' since it was taken out of the envelope in the beginning by the FBI agent and put on his wrist. The watch had a double purpose; identifying that the contents of the envelope was his (the tan lines matched), and warning him to 'go'. Even though it's second purpose hadn't been served yet, it's assumed that anything outside the envelope shouldn't be needed anymore, therefore he wouldn't second guess this.
Corrected entry: In the scene where Jennings and Rachel are trying to deactivate the device, Jennings zip-ties a bullet to one of the tanks. All Jennings said he had left were the crossword puzzle and the bullet. If this was the case, where did the zip-tie come from?
Correction: Zip ties are quite common in computer rooms with a lot of wiring like he was in at the time. Since he saw this future he realized he wouldn't need to mail himself a zip tie.
Corrected entry: The bullet that is fired at Ben and shown time and time again from the future is a whole bullet. It still has the casing on it; only the tip fires out of a gun.
Correction: There is no casing on the bullet after it is fired. It looks a little like there is because there is a circular groove on the butt of the bullet, but the casing for the bullet is missing. When they show the bullet in the gun, the casing is wider at the bottom, tapering in towards the bullet half way up its length. After it is fired, the bullet shows completely straight sides - no ridge that the casing would have presented.
Correction: It's obvious that Jennings was not "locked up", as he was able to purchase and acquire the items which he sent to himself in the envelope, as well as purchase a lottery ticket.