Unit Price combines quantity and attribute costs?

I've just noticed that on the Shopping Cart Contents page, the "Unit Price" reflects both the Product Price and the Attribute Price versus separating them. Is this normal behavior?

For example:

Bob purchases 5 Widgets for $6.95 each
Bob also chooses to add a Widget Extender for $7.00 (an attribute) for the Widget. So, 5 of those get added to his total by default because he purchased 5 Widgets.

In the Shopping Cart, it will show the following:

Qty.        Item Name  	Unit  	         Total
5            Widget     $13.65           $68.25

Now, if you add this up, the total is correct, but when you look at the "Unit Price", it's added the attribute price to the product price. So, it makes it look like the $6.95 Widget is really $13.65. Shouldn't the shopping cart keep the product unit price separate from any attribute prices or maybe show the cost of the attribute?

After visiting numerous zen cart sites, this is the default behavior.

Is it possible to override this? I would like the shopping cart to showe the unit price and then itimise the extra costs - the attribute prices - Is this possible?

Thanks

Gillian