Woocommerce Mini Cart Update Issue

Hi,

I am a beginner of WordPress and using WooCommerce whitelight plugin to update cart info at header like this http://demo2.woothemes.com/?name=whitelight at http://staging6.raison-online.com/basket/ with some bulk discount option. As I add more than 1 product it calculate total amount as per single product but as I check my cart page everything works fine. Can anyone please help me in doing this?

Thanks