At first I was thinking that you simply entered in the wrong item number or something of that nature, but it appears to me that perhaps the item you were sniping was taken off the eBay listing, and the listing number was given to this auction (like Sniper Sara B. said). It seems to be the only logical explanation...that or the scarey fact that someone used your eBay ID to bid. Though it still seems a bit odd that they not only used your ID but also used AS...
I don't know a lot about these kinds of things, since I never had this situation happen to me before. Though I have noticed that sometimes eBay shows on my MY EBAY page this list of other items I may be interested in...and they have nothing to do with items I search for...I always wondered about that. It's like someone else gets on my name and does some searches...
Though I do believe eBay just lists random things in that list. Most of the time I keep it hidden since I find it very unnceccessary. Anyway, I'm sure with a bit of probing you can find an answer to how you won this widget.
*~samuraiblossom~*