What is the size and finish of your pool (plaster, vinyl, fiberglass?) and how new is it. These are all factors that need to be taken into consideration. The upward pH drift is normal becuase as the cell generates chlorine it also produces sodium hydroxide as a byproduct. If you pool is small and fiberglass or vinyl a pint of acid a day seems excessive but if it is a large, new plaster pool perhaps not.