If your CYA is 65, then it's time to stop using the dichlor and switch to bleach. It's also time for you to keep a minimum of 5 ppm of chlorine in the pool at all times. Sometimes it just takes a few days for it to register. You've been using a lot of dichlor, so I'm not surprised it's risen a bit. If your pH is below 7.0, dose it with Borax to bring it back up to the 7.2-7.6 range.

Relax--it's just a pool!!

Janet