Problem while deleting and adding product to Cart

[Nagaraj]

Hi,

I am using
Joomla! 2.5.4 Stable
virutemart version 2.0.24
BreezingForms 1.8.4 Stable
Breezing Forms Custom Fields for VirtueMart, System Plugin

I have a product with multiple options available in it. So i can add that product multiple times to the cart. Every thing works fine when i add multiple products with multiple options to cart. I am facing a problem only when i delete a product from cart and while adding the same product to cart multiple times. It deletes the correct product when i delete it, when i try to add same product to the cart it adds up to cart but when i add same product next time it adds up the new one and deletes the last add product in cart. Can any one suggest a solution.

For example : i added 3 products ( X, Y, Z , Y ) to cart, later i removed 2nd Y product from the cart and try to add same product to the cart but the product is replaced on 1st Y product.Its not adding another product to cart instead it replaced !! Any suggestions y is it happening.

Thanks