Link to product page error

-- HikaShop version -- : HikaShop Business 2.6.3
-- Joomla version -- : 3.5
-- PHP version -- : 5.5.12

Hi,
There is a situation that never happen before of my developing site, I really don't have a clue of what to do, please help.
The URL is : ccfia.org.tw/purity/index.php/typography
This site uses tow man templates, one for shopping and the other functions use another template.
Following is the screenshot of steps to generate the error:
Step1: select the first category （http://ccfia.org.tw/purity/index.php/2016-07-28-03-18-37）
Step2: choose a product of the category --> error page
url of the detail product page:
ccfia.org.tw/purity/index.php/component/...8C%85-40g-5%E5%8C%85

Step3: select another category, any other except the previous will do. ( ccfia.org.tw/purity/index.php/2016-07-28-03-24-17 )
Step4: Choose a product from the category --> link to detail product with wrong template.
url of the detail product page:
ccfia.org.tw/purity/index.php/component/...8%E5%8C%85-%E7%9B%92

My problem is :
1. When I enter the product detail page from first category, I got an error page,
2. When I choose the other category's product, the product page's template if different from that of the product list.

Please help me solve the problems, Thanks
Best regards

Hi Nicolas,
Regard to the error like to the product detail, I've checked the Canonical URL or the error products and It was empty(4. CanonicalURL.PNG), just like the other correct products. The products data was originally export from my another site, so I guess the problem comes from the import.

As for the product detail template, the template of the product list page is inconsistent with product detail page.
The product list page uses lt_shop template and the product detail page uses purity template, how do I set the product page to use lt_shop template?
Following (6.PageLayout.png) is the screenshot of the page layout setting, it was set to use lt_shop temple with show_ujoin display view.




Best Regards
Scott