It appears that part of my comment was omitted. It should have read:

I am using ubercart with flatrate shipping and when I use the workflow_ng "Check an order's number of products" condition and highlight the products to which I would like to apply this rule (I manually select all of the product numbers listed since they are all of the same type), the rule is not applied to all of the products which I have selected. If I select ALL PRODUCTS at the top then the rule is applied to the products which fail when I have manually selected them. Is the products value the node or the SKU? What is the best way to debug this problem?

Thanks for your help,

Patrick