Is it at all possible that you're testing CC and FC out of order? I'm sorry for asking, but I've been puzzling over this issue. The FAS-DPD test method is:
Measure pool water sample(I'm presuming 10ml)
Add a scoop or two of R-0870 DPD powder and swirl until solution turns pink.
Add the R-0871 titrating solution counting each drop and mixing.
Multiply drop count by 0.5ppm to get FC reading.
Add 5 drops of the R-0003 DPD Reagent #3.
If the solution turns pink again:
Add R-0871 solution counting each drop and mixing.
Multiply drop count by 0.5ppm to get CC reading.

I hope you're not offended, this is a real headscratcher.