Applying discount to all products in a category

Hi

I wish to add a discount for every product in the basket from a specific category. I have set the Category as the Act and Percentage off order line (with 50 as value) as the Award.

Problem is that the discount is only applied to the first orderline and not the rest of orderlines.

My problem is simular to this topic:http://our.umbraco.org/projects/website-utilities/ucommerce/ucommerce-support/27228-Applying-a-discount-to-all-item-in-category

I am using uCommerce 2.6.1.0 - Is this a bug in this version?

//Michael