Problem with addition of multiple variations for same product !!!

Hi Shaon,

I really need your help and help will be appreciated.
I am using wp marketplace plugin on my ongoing project, and having issues whenever i will add there two different variations for same product, it will always update price for last one.
i.e. – first user add a product with base price $70 and
variations are following
flavour – Cola
Price – $20

Size – 250ml
price – $45

Now users cart total is = 135 (it is correct)

now when i will try to add same product with following variations it will update cart total according second variation.
flavour – Mango
Price – $50

Size – 250ml
price – $45

Now it need to be = 135 + 165 = 300 ( right )
but it is showing me = 165 + 165 = 330 ( wrong )

I really appreciate your help.

Many thanks
john

http://wordpress.org/plugins/wpmarketplace/