Cart variant price are adding in discount not in sale price

[skhn123]

Hi All
I am using VM 2.6.0 and Joomla 2.5.24
i was looking for solution for this issue and found this thread http://forum.virtuemart.net/index.php?topic=115388.15 but changes are already done in calculation.php so nothing to do there i guess.
My scenario is "In Back-end" Actual product price is 55 Rupees, i put 50 rupees in override box and selected override final and added some variant with their relative prices.
"In Front-end" it displaying sales price 50 rupess, Discount -5 rupees (Which is good) but when you choose weight from dropdown it adds variant price to discount rather than sale price.

So if someone know what exactly is the problem please help me out.
see product page : http://indiangrahak.com/index.php/home/grocery-staples/best-almond-detail.html

[skhn123]

Did i ask this in wrong category or what?

please help me.
Sadique Khan