In this scenario, the base dimension (Product) is not in the worksheet and the level 0 attribute member (Caffeinated_True) is in a row. A drill down on Caffeinated_True does not change its location, but displays the members of the base dimension associated with Caffeinated_True to the right of the row.
Before drill down: Caffeinated_True is in a row.
After drill down: Caffeinated_True remains in the same location. 100-10, 100-20, 200-10, 200-20, 300-10, 300-20, and 300-30 (members of Product with the Caffeinated_True attribute) are displayed in a row next to Caffeinated_True.