The mystirious tax problem!

Store URL: http://www.yinhealth.com/
WordPress version: 3.5.2
WP e-Commerce version: 3.8.8.5
Gold Cart version:
Theme:

I did this:

took all tax off products and turned off tax in store settings

I expected WP e-Commerce to do this:
Dispaly no tax in email or checkout

Instead it did this:
Still displays 10% tax to products

http://wordpress.org/plugins/wp-e-commerce/