I think, the real issue is which way you go with "up" or "down." Some people want to go "up" in channel number when you press the "up"/"page up" key, and down when you press down. The way the guide works, pressing "up" moves you up the screen, but down in channel number.
SOME people find that "confusing."
They don't look at the guide to see what is up and what is down?
Guess they get really confused on a computer with a mouse!
And calendars must really mess them up.