All I want to do is allow a discount if someone buys 2 of these products.
If they just buy one it is full price.
I thought this would be easy and set up a Price Rule that says:
If ALL of these conditions are TRUE : If total quantity is 2 for a subselection of items in cart matching ANY of these conditions: SKU is one of...
and then I added all of the products I wanted this to work for.
The Price Rule works if I add two DIFFERENT products from this small group to the Cart and the discount applies. But if I add two of the same product (with same SKUs) this doesn't work.