I think I see what you're getting at here and I agree 100%.  Order History needs a "Quantity" column.  They also need to pad their number output from the "Total" box correctly.  I'm getting totals written out like $18.20725 and $169.5.  It just looks rushed and amateurish, no offense.
You're aware, though, that you get a detailed order breakdown in your payment receipt from Paypal, right?   Just checking.