Doubling up on Taxes for one zone only

First, I apologize, I am not the most technically-minded person.

We sell products throughout Canada and have specific tax rates for each province. Until 2 purchases came through yesterday, it seemed like the taxes were calculating properly.

Starting yesterday, on BC only, Zen Cart is calculating the tax like this: HST + GST (should not be there at all...) + HST (again) + GST (again!). Customers are being charged double the tax, but only on this zone. When I look at the Tax Rate for this zone, it is set up as 12% HST. I can't figure out where the 5% GST is coming from or why it is doubling it...

I did a bunch of test purchases and BC is the only zone that this is happening to...

Any help would be much appreciated.

Thanks in advance.

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v1.3.9h

We have been using Zen Cart since June 2011

Unfortunately, the person who built this website is MIA. I cannot accurately answer the question regarding customization or add-ons. I apologize for the lack of information and understand it makes it difficult to figure out why we are having this problem.

I have browsed the FAQ & Forums and have not seen the exact problem (or a resolution) to what we are experiencing. I did see one post that recommended checking the zoning. I checked my Zone Definitions and it looks like this:

ZONE DESCRIPTION
Alberta AB 5%GST
British Columbia 12% HST
Florida Florida local sales tax zone
Manatoba MB 5% GST
New Brunswick NB 13% HST
Newfoundland NL 13% HST
North West Territories NT 5% GST
Nova Scotia NS 15% HST
Nunivut NU 5% GST
Ontario ON 13% HST
Prince Edward Island PE 5% GST
Quebec 5% GST
Saskatchewan SK 5% HST
Yukon Territories YT 5% GST

My Tax Rates look like this
Tax Rates
Priority Tax Class Zone Tax Rate Description
1 Taxable Goods Florida 7% FL TAX 7.0%
1 Taxable Goods Alberta 5% 5% GST
1 Taxable Goods British Columbia 12% 12% HST
1 Taxable Goods Manatoba 5% 5% GST
1 Taxable Goods New Brunswick 13% 13% HST
1 Taxable Goods Newfoundland 13% 13% HST
1 Taxable Goods North West Territories 5% 5% GST
1 Taxable Goods Nova Scotia 15% 15% HST
1 Taxable Goods Nunivut 5% 5% GST
1 Taxable Goods Ontario 13% 13% HST
1 Taxable Goods Prince Edward Island 5% 5% GST
1 Taxable Goods Quebec 5% 5% GST
1 Taxable Goods Saskatchewan 5% 5% GST
1 Taxable Goods Yukon Territories 5% 5% GST

I aplogize if I have overlooked something in the FAQ or another Fix in the forums.

The problem started on Oct 19 as far as I can tell. However, prior to Oct 19 we had not had any BC customers, but taxes were being calculated properly for all of our other customers from various Provinces & states.

The site has been tested and active since June 2011. It is applying the proper tax rates to US consumer and Canadian Consumers of other provinces.

Thanks again.

Admin->Locations/Taxes->Zone Definitions -- click on BC, then click Details. What country/province settings are selected there?

The Country is Canada and the Zone is BC (British Columbia)

I checked a couple of other provinces, and they seem to be set up the same way.

Thanks for your prompt responses.

I was just wondering if anyone was able to help me with this issue? It is still applying multiple taxes...