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I test in other computer and browsers , us.miicards.com/products , I see a total amount of $165, did you see , cart empty?

No I don't. It's probably an old cart which has inconsistent data in your database for your user.
If you try with the user/password test_hikashop you should not have the problem.
You could empty the table hikashop_cart and hikashop_cart_product via phpmyadmin to not have the problem anymore.

Wow, your right , that's the problem , again thanks a lot

Nic, I did another user and after a add something to the cart and then delete it ,it give me the same issue , can you try to add a product then delete it please,

thanks so much

Nic, I did empty those tables and work good , let you know if that come back, thanks

Nic, I keep having this problem , I empty the tables you said but that thing come again , also without login ,thanks for your great product again, look, us.miicards.com

You should reduce the cart retaining period in the configuration of HikaShop to one day or so and empty these tables one more time.
Then, you should hopefully not have this problem reoccurring.