Showing in Invoice payments details made to it

I sent a question to customer service becuase the invoices do not show the payment details. They will only show the amount due, total amount of payments and balance.

Customer service told me that the invoice is a separate document from the payments made to it and I can generate statements but I cannot show payments made in the invoice.

Does it make sense to have an option to show the payment details on the invoice like the sales order?? For example

payment type - date - amount
check          01/12/11   $100
Visa-4444    01/17/11   $50

Several clients have asked me to give them a break down of payments in the invoice as they need it for reimbursments, but they don't want a statement, they want a receipt showing the invoice details and how it was paid.