If the sample turned pink at all, you had a little CC.

For the dilution method of testing pH when you have high chlorine levels, you have to use equal parts of pool water and distilled water. Try that test again.

Don't retest CYA for awhile or else you'll just be wasting reagents. I assume you are using dichlor? (I didn't want to take the time to reread a 34 post thread to look and see.)