Facebook remembers previous image when trying to share page

This is driving me mental! I have page which has a share button on it, for arguments sake I have hard coded the image name and title in the controller as shown here

 public ActionResult ThankYou()
    {
        var model = new LabCombination
        {
            ImageCombination = "danone_ultimate_coconut_vanilla.png",
            ImageTitle = "danone_ultimate_coconut_vanilla"
        };

        return View(model);
    }

In my view I do this

  <meta property="og:title" content="Check out the flavour I just made! @Model.ImageTitle" />
  <meta property="og:description" content="Check out the flavour I have just created!" />
  <meta property="og:image" content="http://ift.tt/1zfAogH" />
  <meta property="og:url" content="http://ift.tt/1FqcwLU" />

which renders as follows

 <meta property="og:title" content="Check out the flavour I just made! danone_ultimate_coconut_vanilla" />
 <meta property="og:description" content="Check out the flavour I have just created!" />
 <meta property="og:image" content="http://ift.tt/1wpO6TI" />
 <meta property="og:url" content="http://ift.tt/1FqcwLU" />

When I do the facebook scraper I see this

yet when I go to the page a press share I see this

Why is facebook not refreshing! I have cleared the cache in my browser!

You can scrap the page here

http://ift.tt/1sbmVox

with the following url

http://ift.tt/1FqcwLU

Any help would be appreciated