2006 Mazda 3 hatchback automatic
 

Help please. My auto Mazda 3 seems to have a window problem. My front passenger window will only open either a couple of cms or will open completely (nothing in between). That is from both the passenger and driver side controls. Is it designed to do this (can't imagine why) or do I have a problem? It's just a bit of a nuisance. Many thanks for any advice.