I am running ML 7.0.2.1 and need to know if shipping zones are mutually exclusive.
Basically I have set up a number of zones that apply to one shipping method (Australia Post) and assigned postal codes to zones according to that shipping method.
I have a 2nd shipping method that uses a different configuration of postal codes. To achieve this I set up new zones that reflect this configuration and then allowed these zones on the new method.
Shipping Method 1: Allowed Zones A,B,C
Shipping method 2: Allowed Zones D,E
(Zones D & E are necessary because they are not the same combination of postal codes as zones A, B & C)
If a postal code is assigned to both Zones A and Zone D, then I would expect to have both shipping methods as an option on checkout, but this is not happening.