Tax Rules at Province Level not working on AP Invoice

 I am working on an implementation that is configuring EBTax for Canadian PST Tax. Is anyone aware of how to default tax rates based on the Ship To Province?

If I define all my tax jurisdications and tax rules at the country level I am able to get the tax rates to default on the AP Invoice. However, as soon as I try to define the tax jurisdictions and tax rules at the Province level the tax is not longer getting defaulted.

I have a feeling this might have something to do with the way the Geography Hierarchy is setup in the Trading Community Manager. I am not able to define any mapping in the Manage Validations form. For some reason it is not recognizing the standard Canada International Address Style that we are using for our location setup. This is defined under DFF Human Resources - Location Address.