The person who decided to make this scroll sideways instead of down when you scroll down, and not to scroll sideways when you scroll sideways should be put in stocks in the town square.
Maybe you didn't get the memo, but it's actually an early release of the 'new' way scroll. Scrolling 1.0 = normal scrolling Scrolling 2.0 = left/right up/down directions are inverted respectively Scrolling 3.0 = left/right scrolling only, via up/down gestures (use left/right gestures at your peril)
Man, this thing drives me nuts, and it's the first thing I change in every touchpad-equipped device I own.
Scrolling is not swiping, people!