Cap. questions, Wintesla, PFC

I am collecting the equipment for my first coil.  I am going to use a
9kV/30mA NST for starters.  Under the "Trans/Cap Match" tab in Wintesla
my Cap match is 8.8 pF which makes sense.  My first question is when I
go to the "Primary Coil" tab the required C is different (4 pF) (Pri
info ID 5.5,WD 1/4", Space 1/4", Total turns 10.6) Do I want to adjust
the coil parameters to bring this "C" into line with the one listed
under "Trans/Cap" or is this the value I should use, or does this mean
something total different that I am overlooking.  Second question
Wintesla starts out with a Power Factor Correction Rating of  75%.
Should this value be left at 75% or would it be better to run it up to
100%. Should I even worry about the PFC.  If it should be left at 75% is
that because of the phasing of the voltage/amperage.

Thanks guys.