The word "Caribbean" is spelled as "Carribean" as the helicopter approaches its destination.
You can't pick up somebody else's package from the Post Office. You have to present identification to prove you are the recipient of the package. Otherwise just anybody could walk in and steal anybody's else's package.
Entering the correct code on the keypad would cause just the green and white buttons to light up, not the red or yellow buttons.
MacGyver is able to activate the helicopter by flashing sunlight onto the sensor with a mirror. That would make it relatively easy for the enemy to compromise the helicopter's use. No one would design a helicopter that could be so easily compromised.
When MacGyver walks up to the car to get a flashlight in order to try and get into the helicopter, the filming camera light comes on, which not only is seen coming on in the reflection of the car, but stands out big time lighting the side of the car up. Then MacGyver walks away and you can see the light turn off and the car darken.
Macgyver has to use a flashlight to beam light into the helicopter's sensor to unlock it since the key card no longer works, yet when they're in the Caribbean, several people open the doors no problem without having to flash light into the sensor.