Best Buy sent me this email today…stating they will honor all aspects of the deal!
“Dear Best Buy Customer,
Thank you for your order on BestBuy.com.
We appreciate your purchase of the SanDisk Cruzer Mini 1.0GB USB 2.0 Flash Drive. This product was erroneously offered with a duplicate mail-in rebate, however, Best Buy Co., Inc. intends to honor the two Best Buy mail-in rebates (59328, 59599) on this product to customers whose order has been fulfilled and meet all of the Terms and Conditions of the offer. The third mail-in rebate (SD10549) will be honored by San Disk if their Terms and Conditions are met.”