Not accurate.
Crew must be in excellent health as flying is exhausting, both physically and mentally, to your body and any condition could have a great impact on your health and safety.
An increase or decrease of any part of your CBC could be an indication of a disease in your body. A decrease in number of red blood cells could be because of anemia which would make you fatigue and could also affect your concentration. An increase in the number of white blood cells could be because of an infection in your body. There could be many reasons as to why they are asking you to take the test again but it could be as simple as an infection in your body which would affect the results of your CBC.
QR would ask you to take the test again to see if it's permanent or temporary.