I am using the calcium hardness test out of the taylor K2006C test kit and i keep getting the purple color instead of blue. I have added the five or six drops of titrant prior to the buffers as siggested but still get the same thing. I just do not trust the results I am getting and don't know if I should be doing something different. Stats for my pool in case they are needed are:

20,000 gallon salt pool
pool is 2-1/2 months old
FC 4.4
CC 0
Ph 7.6
TA 60
CH 460 (?)
CA 60
pool temp 66 degrees