This is actually normal. If you don't like it go to System Preferences > Trackpad and uncheck the top checkbox that says "When using gestures to scroll or navigate, move content in the direction of finger movement"
Best of luck.
I don't know how "normal" it is... Never in all my time since the creation of this feature on Tiger (2005) have I had to go in and change any setting to have the page go down when I two-finger scroll down on my trackpad.
BUT, *you* provided an answer - something Apple's customer support on the phone couldn't do! THANK YOU so much 😀 I was seriously just about to downgrade back to Snow Leopard and be content with never upgrading until this issue was resolved. Sounds silly, I know... but I love two-fingered scrolling 'not normal' 😉
...now, I just have to upgrade my Office 04 to be compatible...I wish I had known that part before I upgraded (newer versions of office suck) 😟 oh well though!