OK. It's good to test your PH and TC daily but you don't need to test the TA/CH, you can get away doing it bi-weekly. The daily dose of MA is driving the TA down. What is you CSI index? At a quick look you're below -.6, your CH may be coming from the plaster.
Let your PH climb, you can keep it at 7.8, the range is 7.5 to 7.8. (These are recommendations.)
Looks like your keeping you PH too low. What's the reasoning there?
keep adding the daily chlorine, but stop the MA (wait till it gets above 7.8 or higher)