Your target numbers look fine.

Don't run the CYA test so often. Also, after your addition of CYA on 6/27, your numbers all range from 55-70. This test is so subjective that you can't pinpoint an exact value, so getting these results doesn't necessarily mean you are losing CYA. They are all within the range. I wouldn't worry about it. Since it has been a week since you added CYA, go ahead and add more if your target is 80-90 but then don't run the test for a week or so. You're going to use up all your reagent if you test so frequently.

Run a CH, pH and TA reading on your fill water. (If you've already been asked to do this and have the results, post them. I didn't want to take the time to reread the whole thread.)

Use some more muriatic acid to lower the pH.

What all are you adding to the pool? (Ingredients, not just product names.)