Problems with overlapping tax zones

[vpod]

Hello,

I have 2 tax zones:

Zone "A": Includes a group of countries. - for example "Albania", "Spain".
Zone "B": Include 1 country - for explample: "Albania".  (that is included in the Zone "A").

When a customer belongs to the zone "A" he can select 2 payment methods ("Y", "Z").
When a customer belongs to the zone "B" he, also, can select the "X" payment methods.

All payment methods can be only part of one zone (as far as I know).


P. Method --> Zone
X -> B
Y -> A
Z -> A

But when I create an order with a customer from "Albania" I only see the "X", and not (as I expected) "X", "Y", "Z".

Any idea?