THIS is normal random variation in test results.
Same test w/ 2 scoops: FC=27. CC= 2.5
Then I tried 3 scoops: FC=31. CC=2

HIGH chlorine bleaches out low levels of DPD; this is ALSO a typical result.
THEN I tried 1/2 scoop: sample "flashed" pink and then went clear again.

THESE are also normal random variation in test results; statistically speaking, they are identical results.
Yesterday evening @ 8:30pm
1 scoop: FC =30. CC=3.0
2 scoops: FC=32. CC=2.5
Did 2 scoops again: FC=32. CC= 2.5

This morning- tested @ 7am:
1 scoop FC=30 CC=2.5
2 scoops FC=32 CC=2