questions about KO

recently Russ suggested i should learn a one-level, unbalanced system
In place of my home brew.   I learned it and have used it in practice
only, with good results.  Overall it seems like a good system.  I am
confused a couple things though.

1.   The 'pivit point' is fairly clear - at his point the number of
six low (2-7 cards has been weened down to number equal to the five
high cards.   The 'keypoint', however, seems a little slippery.   It
is presented as the point where the odds favor the player, and the
book does say it is not exact.   After playing many simulated shoes on
the computer I think that the keypoint yields 'false positives' deep
in the deck.   What do others think?

2.    Early in the book it says "there are only two bets, large and
small".  but later on it gives a chart where the bet is gradually
ramped up beginning at the keypoint and maxing out at the pivot point.
 Which way is it supposed to be done?

thanks in advance for anyone's thoughts . . .