Other mistake: Bryan's daughter Kim has an iPhone - when you see the phone she has no signal, but is able to make calls from the phone. This happens twice.
Other mistake: When Bryan types "US Embassy" into the GPS, the letters that he types on the keypad don't match up with the letters that end up appearing on the screen.
Other mistake: During the first chase scene in the movie about 10 seconds after the man on a moped is knocked over you can see through the car's back window that a woman is walking at the same speed as the speeding car.
Chosen answer: Hardly paranoia, as such, more just giving Kim options. Kim has a noted interest in travelling abroad; cars in Europe are far more likely to be manual transmission than in the automatic-dominated US, and thus, by teaching her to drive a manual car, Mills may have made it easier for her to, say, drive a hire car on her travels. Manual transmission cars also tend to get better fuel mileage, are usually less expensive, certainly give you more control and are, in my opinion at least, more fun to drive, so there are some practicalities involved as well. Really the question is why wouldn't anybody at least learn how to drive a manual car, even if they usually end up driving an automatic.
Tailkinker ★