Other mistake: Dante and The Agency both have extensive photos and videos of the team's previous exploits. Trouble is that most of it is simply stills and footage from the previous movies in the franchise, often occasions when nobody was around with a camera to witness and document what was going on, certainly not at the angles we see.
Other mistake: When the bear falls on Eddie, they are facing the same direction, but Eddie says that he knows the bear is a girl "Because its vagina is on my ear."
Other mistake: As the divers prepare to descend to the Roman shipwreck, none of their buoyancy aid inflation valves are connected to an air intake. This makes the rapid inflation, which happens on their ascent back to the surface, impossible. (01:15:15 - 01:15:50)
Other mistake: When Sam and Tara first meet Gale outside, after Gale gets punched, pay attention to the multiple news crews behind her as they start arguing about Gale's book. Randomly, they go from paying attention and recording to suddenly all dispersing and packing up after the shot cuts to Sam and then back to Gale. This makes absolutely no sense. They're all involved in a very famous case; there's no reason every reporter there would suddenly start packing up in the five seconds they were offscreen.
Other mistake: At first, Ethan tries to board the train by waiting until it slows for a sharp bend. Thanks to The Entity, the train is going pretty much full speed throughout, but doesn't derail or tip at the lower speed sections. In fact, the diners are all blissfully unaware that this is, in effect, a runaway train as they consume their canapés and fois gras, with soft music playing in the background.
Other mistake: When driving to the Jordan's home in Wilmington, Sonny reads a highway map when he's driving the side streets.
Other mistake: After the first guard at the chemical plant is sniped, the second guard goes to check on him and is surprised by the sudden appearance of an attacking helicopter. Helicopters are extremely loud, and flying as low as it was depicted would also vibrate the ground and the building. There's no way it would have been able to sneak up on the guard like that.
Other mistake: Just when the tower clears 119 to take off, it shows the PFD and MFD screens. On PFD it shows air speed 250 knots and altitude 40000 feet which could only be happened when cruising in air. Also, on MFD it shows ground speed 250, and no flight path displayed. (00:09:00)
Other mistake: Halfway through the film, a cityscape with the subtitle "Russia" is shown - the city is, in fact, Atlanta. Skyscrapers such as the SunTree Plaza, Westin Peachtree Plaza, and the Georgia-Pacific Tower are visible. (01:24:00)
Other mistake: Technically, none of the Rangers should have been able to morph by calling for their original dinosaurs. All of those powers were lost during Zeo. As such, Billy lost his ability to morph, which was why Jason was called in to become the Gold Ranger.
Suggested correction: It's in the title "Once and Always" and repeatedly said "once a ranger, always a ranger." This is not a "mistake" of the movie. This movie is a one-off anniversary special. Not in complete line with the show's continuity. They did this with the original Mighty Morphin Power Rangers: The Movie as well. They have also historically done this with team-ups, such as when Adam came back to be the Black Power Ranger, same with Justin in In Space, same with Jason most recently, same with Tommy (RIP).
Despite that phrase, three of the original Rangers gave up their powers to attend a peace summit; we saw the powers leave their bodies and transfer to the new Rangers. The original poster is correct that those powers were lost to them, therefore, they should not have been able to morph. Jason is the exception since he was given the Gold Ranger power, that relinked him to the morphing grid.
Other mistake: In the Special Thanks section, Bobcat Goldthwait's name is misspelled as "Goldthwaite." (02:28:28)
Other mistake: Poirot receives a box of chocolates when he's home, then goes out shopping for eggs with the same box in hand, and in the next scene he's back home, having breakfast with the eggs. There's no apparent reason for this behaviour; who goes out for an errand bringing along a sealed box they just received?
Other mistake: The sun is shining and the road isn't wet, but a shot of the windshield when Paul turns his head toward the backseat shows short diagonal lines covering the windshield. The image suggests but does not resemble rainfall. In front views, the windshield is clear. (00:09:48)
Other mistake: When Adam Sandler calls his daughter on a video chat in the car with her friend, the picture of his daughter is not the same as when she is in the car. When they jump between her and him on the call, her hair and background are completely different than they are in the car. (00:23:17)
Other mistake: All the websites, both in the address bar and the results of the search, have no top-level domain like .com or .org. Everything is just www.something instead of www.something.com. (00:10:30)
Other mistake: Story 2: Myosotis. The beekeeper's wife had her back to the dishwasher, so should fall/slip face-up onto the dishwasher (and knife), but she was face-down. (00:25:35 - 00:26:15)
Other mistake: In the movie, the mission takes place on the Space Shuttle Discovery. In the scene with the shuttle on the crawler, coming out of the Vehicle Assembly Building, Atlantis is pictured instead of Discovery. (01:39:48)
Other mistake: In the cemetery scene, one of the tombstones is shaking due to the wind.
Other mistake: When Father Amorth takes the key from the caged corpse's stomach, it's obvious that nobody could have swallowed it in the first place.
Other mistake: Three fingertips are shown dropping to the floor, but there are sounds of four fingertips being broken off. (00:03:33)