METRO Apps don't scroll with the scroll wheel :(

Some METRO apps work amazingly well with my MS mouse. It also has a button which works as the back button. But it mostly works only on Bing Apps and other default. The others are not supporting scrolling with mouse and the back button. MS/Developers have to get it right before launch or else the reviewers will rip them off. Scrolling using keyboard is a pain in the butt. What is this Windows 3.0?