Our pool was finished mid July 2016. For the first five weeks it was on chlorine tablets while the plaster cured. Then switched to salt. I thought I was learning and understanding how to keep the pool balanced. However, while the salt reading is around 3600 the Cl is reading at the deep pink 10 level. The pool is clear, it doesn't smell, I swim in it regardless. Typically I add muriatic acid once a week to keep the Ph in level in range. But I can't find any reason for the high chlorine levels. What am I missing or not understanding?