Since you report 9.8 for FC and 0.4 for CC, I presume you are using a 25ml sample for the chlorine test. You will conserve your testing reagent by testing with a 10ml sample ( and multiple by .5 instead of .2 ). You'll burn through the drops really fast with the 25ml test.
How do you come up with 56 for CYA?

You can let it ride if you want to, as long as you keep the FC above 5 all the time and your CC is 0.5 or less and your don't lose FC overnight - you're OK for chlorine. Fine tuning is something to avoid - the goal is to get your numbers in range, not exact. You can go bananas trying to get "perfect" numbers but it's pointless to try. Anything in range is perfect.

pH is weird, do you rinse the test tube with pool water before collecting the sample?