Interesting Itemization

I paid for an item at the self checkout at Home Depot tonight. After getting home, I glanced at the receipt before discarding it. And I noticed something odd: there were four tender lines listed, like this:

Sales Tax 0.34
Total 4.55
Cash 1.55
Cash 1.00
Cash 1.00
Cash 1.00

Seems that each dollar coin I deposited forced the computer to add a new cash line. This is particularly strange to me because the receipt is printed at the end of the transaction, not during the transaction.