Tony was correct in telling you that in our MLS this house shows withdrawn- however it was withdrawn on October 1, 2008. Which as the owner, I am sure you know this. But I wanted to do my homework so I could answer you appropriately.
The link you gave is a Trulia link which picks up properties from our MLS and various other sites such as Realtor.com. It's possible your agent may have listed it here as well. But since it says "Sold" rather than "Withdrawn" I would guess that it was picked up from another website.
I think probably the most logical explanation would be that Trulia didn't offer an option or recognize "Withdrawn" so by default it was marked as Sold.
If you would like that information changed, as I'm sure you do, you could contact Trulia and explain to them basically as you did here and I'm sure they could go in and probably delete the listing.
Hope this was of help