this is what happens when you make a test instrument do what it isn't
supposed to.
Yes, what you actually measure is the interwinding capacitance pf the
coil. the bigger coils have quite a lot of it. besides, the capacitance
is not a linear function of size. there are so may factors influencing
it that you can't realy calculate it. like they say, your shoes size
and underwear color go into it.
but it's OK: thi is the way it's supposed to work.
I compared it with the Autek analyzer I laso have
Saandy 4Z5KS