Tony, you're right to remember that high chlorine affects phenol red . . . and in spite of having warned about that many times, I was forgetting it. But I lucked out, and still gave good advice. High chlorine makes pH appear high, not low. If you are still reading low, (7.6) I think it's prudent to assume you are.

In any case, the higher the pH, the greater the propensity to form monochloramine preferentially over other species. (So, add borax!)

Ben