stemme flaperon mix control

i'm considering buying a used s10-vt, and have so been flying one in
the x-plane flight simulator extensively as of late. but i think it's
model of the control surfaces is inaccurate and so am hoping someone
could provide me with some info regarding the
flaperons.

specifically, an australian POH that i found says there are 6
positions for the flaps: -10, -5, 0, +5, +10, and +16. a brazilian
certification form confirms this, and further says that the ailerons
can deflect from -16 to +10. what i don't understand, perhaps because
i'm new to full-span flaperons, is how the 6 flap positions affect the
range through which the ailerons can move. how to say this
succinctly... hmmm: irrespective of the flap position, can
one always move the ailerons through 26 degrees? in other words, with
flaps set at 0, do the ailerons move from -16 to +10, and with flaps
at +16, do they then range from 0 to +26? or does it work some other
way?

i ask, b/c in the x-plane simulator, with full flaps in (+16), aileron
input has no effect on flaperon position. essentially there is no
roll control with full flaps other than to use the rudder and then
wait for the roll coupling. what the x-plane model does is to have
flap input limit the upward deflection of the flaperons without
increasing the possible downward deflection. and
with full flaps, the movement is completely restricted to none at
all. this can't be how it really works, or is it?

thanks in advance for any info.