When Will has taken the police motorcycle, he begins to head towards a yellow car, and in a first shot he passes the car at great speed, but in the shot directly afterward, he appears re-positioned back to when he first started to pass the car, and the speed he's going is much lower.
On the police's arrival at the off-site security facility, approximately 10 combatants open fire on the police cars, however, when all the police get out of the cars and the camera angle changes none of the cars have received damage and bodies of shot officers have disappeared.
When Sawyer has a standoff with Hong Kong police, two grade-separated (elevated) train lines are plainly visible in the background. Since the demolition of the Kowloon Station in 1978, Hong Kong has no above-ground rail in or anywhere near the Kowloon area where the fictional Pearl Tower is situated, and no elevated rail at all. The city's MTR rail system is almost entirely underground, and its only above-ground portions -- an Airport Express train and a dedicated line to Hong Kong Disneyland -- are at grade (ground-level) and on the outskirts of the city (whereas Kowloon is near its center).
At the time from when Will escaped via Ray's house window to when he escaped from the police on motorcycle to get to the building, none of the building, signage and streets resemble that of Kowloon. The roads appears to be too sparsely populated to resemble the vastly populated city near the skyscraper.
When the Hong Kong police are viewing Will and Sarah Sawyer's profiles on the computer, Sarah's profile lists her as a "combat surgeon" with the US Navy and she is wearing a US Navy uniform in her profile photo. An overlay screen shows a citation for appears to be a "Medic Achievement award, gold star in lieu of second award to Corporal Sarah Sawyer, US Navy."
There is no such thing as the "Medic Achievement" award in the Navy and Corporal is not a US Navy rank.
The registration plates of vehicles consists of a single number after a letter followed by four numbers, not two letters followed by four numbers as they should; the font does not resemble that of those in the country.
The technicians at the offsite facility are killed by eager henchmen using machine guns. Yet, the majority of the computer equipment is not damaged/destroyed. However the men were firing downward at short range (1 to 4 meters (3-13 feet)), from an elevated position, so unless they were completely inept they'd have no trouble hitting the technicians while missing most of the monitors. Also, the only 'Computer equipment' visible are the monitors, keyboards and phones (there's not even a mouse visible). Probably because the workstations were mounted UNDER the desks (there's certainly none visible ON the desks), and they'd only be dumb terminals anyway, only used to access the mainframe system in the other room.
At the beginning of the film the building description stipulates that the accommodation is above the garden levels (floors 100 - 130). Meaning accommodation starts on floor 131. However Sawyer's family accommodation is on level 98. This falls 33 floors below where it should. However at the time the 'Accommodation levels' weren't cleared for use yet (or possibly even finished, considering some of the areas Will was in [just after entering the building] were still under construction) and had 'No Access' beside their description, so it's entirely possible that the family were using executive accommodations on the upper levels of the retail area, rather than an apartment in the restricted zone. After all, who needs 70 floors of retail shops? (or 60 floors of Restaurants for that matter)
The original plan for acquiring the tablet was for it to be stolen from Will's bag at the boat dock. However, the tablet is bio-metrically locked to Will's face and so if the tablet was stolen from the bag as planned, then there would be no way to unlock it without Will and no way to disable the fire systems.
When Will steals the Police motorcycle, you can hear it changing gears as he speeds off. His left leg, from the knee down, is a prosthetic so his foot (which is locked into it's primary position) cannot make the required movements to change gears on a motorcycle.
When Dwayne Johnson's character is climbing up the tower crane - according to the building's height: several hundred meters - and the policemen finally reach its elevator, it is apparent that the latter is in service, although they also had no regular access to the base and had to gain it violently. Thus, since the structure he climbs up, is the same as elevator uses, he must had access to the elevator, too. Furthermore, the characters revealing deliberateness at the top, expecting a locked door, but, however, checks it first, makes a merely missing at the base unlikely, especially, considering the - crucial - loss of time and of his capabilities, needed afterwards.
The goof item below may give away important plot points.
Once Sarah re-activates the fire extinguisher systems, a gas based (CO2 maybe) system puts the fire out in a matter of minutes. These systems work only that fast in sealed areas, as their mechanism is to block the oxygen flow to the fire, and or bind the oxygen. a fire of that size in the height of 500m+ generates a strong upward airflow (even if we don't consider the wind that powers the turbines) and with all the windows broken it can supply unlimited amount of oxygen and blow away the gas.