State Tax showing both domestic and international orders

I need to charge sales tax for CA. residents with a CA. shipping address. The state tax is showing on all purchases domestically and internationally. :frusty::mellow::frusty:
any help appreciated as always. Per ZC FAQs, I use their template below..

1. What are your store settings for these set to?
   Admin->Configuration->My Store
   a. Country/Zone US/CA
   b. Basis of Product Tax Shipping
   c. Basis of Shipping Tax Shipping
   d. Display Prices With Tax False (I don't want the tax included in price, but on order total)
   e. Display Prices With Tax-Admin** False (ditto)**

2. What Zone Definitions have you created?
   Admin->Locations/Taxes->Zones Definitions CA -- Sales Tax

3. Inside each of those zone definitions, what country/zone combinations have been selected?
   Admin->Locations/Taxes->Zones Definitions, click on "Details" button for each **zone Country: US; Zone: California
   **

4. What tax classes do you have?
   Admin->Locations/Taxes->Tax Classes Taxable Goods

5. What tax rates have you created?
   Admin->Locations/Taxes->Tax Rates CA 7.25% (I didn't add the '%' fyi)

6. What tax class have you associated with your products?
   Admin->Catalog->Categories/Products->click on a product to edit it Confirmed all products are 'taxable goods'

7. What tax class have you associated with each of your shipping modules?
   Admin->Modules->Shipping Taxable Goods (fyi, using USPS module)

After wrestling with this, I finally got Sales Tax to only show for our CA customers but I do not understand why this worked.
The module had Florida in it when I began working on it. Once I removed Florida leaving only CA. in all the appropriate places it now only shows for CA. customers.

Can anyone comment on why this would be? I'm just happy it is working now but do not quite get it. Nothing in the FAQs mentioned this..

camigo:

The module had Florida in it when I began working on it. Once I removed Florida leaving only CA. in all the appropriate places it now only shows for CA. customers.If your Florida zone was set to all states and not limited to just Florida, and you have your site set up to calculate tax based on that Florida zone, then taxation of all zones is logically to be expected.
Changing it to use your CA zone makes sense.