?mod=order&action=addFromCheckout

http://ww.wp.xz.cn/support/topic/modorderactionaddfromcheckout

I am getting the same problem. i am using ready ecommerce theme.
http://postadsfreegetpaid.com/?mod=order&action=addFromCheckout
the link shows my homepage.
I thought it may occurs for other plugins. so I have upgraded all of my plugins and uninstalled them except ready eCommerce.
my product page: http://postadsfreegetpaid.com/shop_now/
If needed, i can give you access on my control pane. Please help me to get rid of this.

I have contacted via website contact page. still now, no reply

http://ww.wp.xz.cn/extend/plugins/ready-ecommerce/