Attribute discounts not showing up when purchasing mixed items

[debtag]

PLEASE! Can someone help me!

I sell miniature Beanbag Chairs for 1" scale dollhouses. They come in many different colors.

I went in to each product (color), and made it so if a customer buys:
1-2 cost=$9.25ea......3-6 cost=$8.25ea.....7-10 cost=$7.25ea...11 or more cost=$6.25 ea.

Upon my testing, I purchased 2 of three different colors, and the price came out to $9.25 ea. for a total of $27.75, when it SHOULD HAVE BEEN $8.25 ea. for a total cost of $24.75.

How do I fix this? When I set the discounts, I went to:

admin/catalog/products price manager

There was a drop down box that says, "Beanbag Chairs". I went to one color chair at a time and set up each color as so:

Discount Qty Applies to Mixed Attributes   Yes   No 
Preview Only ... Current Price Status ... Preview Only  
 
Product Discount Info  Discount Type: NonePercentageActual PriceAmount off  Discount Priced from: PriceSpecial  
Discount Levels Minimum Qty Discount Value Calculate Price: Extended Price: 
Discount 1   $9.25 x 1 = $9.25 
Discount 2   $8.25 x 3 = $24.75 
Discount 3   $7.25 x 7 = $50.75 
Discount 4   $6.25 x 11 = $68.75

I must be missing something?

Thanks for your help in advance!