Early Toys R Us shoppers get worm: 2 charges for purchases

Over the Thanksgiving weekend, I swiped my debit card to get on the light rail and was billed for a bus ticket the machine wouldn't give me. I had to pay $1.50 again to get my oldest son onto our next connection. I know! Frustrating.

As someone who's always living on the very edge of black in her checking account, I know too well the dangers of unexpected transactions, and for me they come in $29 overdraft increments. Customers at Toys R Us this weekend, shopping before regular store opening hours during Black Friday, experienced a similar and far more account-balance-deadly problem: double billing.

Keith Bossey, a marketing and strategy consultant in New York City, may not be at the edge of his bank account, but he just found out today he was double-billed for his purchase.