I think this is a US/UK English thing, in the US 'quite' only means 'very' whereas in the UK it often means 'a bit'. (I'm guessing your from the UK).
Saying a burrito is "quite spicy" usually means "surprisingly" but not "excessively" or "extraordinarily".
Those things are already too subtle and hard enough to learn in a second language. People defining the same expression with widely conflicting meanings in different places do literally turn it into a maze :)