It runs from 74% to 71% there is hardly any difference (south africa is 73% atm btw). The quiz is randomised. So whichever are left when you run out of time are the ones you didn't get and that changes with each take. So everybody gets a different last couple of ones, because the order is different.
I agree, I got a lower score than I expected because I spent so long trying to find the blue highlighted country. Need to improve the layout on mobile devices, or state that the quiz isn’t suitable
Swaziland just isn't the correct name anymore. This is like accepting Z for DR Congo.