quantity discount prices wrong

[FarmFritz]

If we change the variety of our product (example: from red to green; green is 5€ more expensive) and the quantity discount is starting (10 units), the calculation doesn’t work automatically at the product page. It shows only the first variety (fix price red – quantity discount). In the cart the calculation is then right (fix price green + variety amount – quantity amount). How can we change it, that the automatic calculation shows the right price?

Thanks a lot!

FarmFritz