Something to remember about Front Row is that the same type of sticker was used for many different cards. It could be an instance of someone buying a Front Row card with the same number (/500) and putting the sticker on another card. Here is an example of a Front Row that utilizes the same sticker but different number (/5000):
http://www.ebay.com/itm/TYLER-GREEN-...cAAOSwV0RXv7l~