Sorry for not checking in - I was completely (almost) offline - camping with WEBELOS.
Yep, with a CYA of 50ppm to 60ppm you are good. I think you should be adjusting bleach dose to maintain an evening FC of at least 5ppm (test before adding bleach). Let's call the FC 2 / CC 8 test anomalous, but do keep an eye on CC.