Before it gets locked, I will tell you all how I did it..
I was in the middle of creating a new thread and then I opened a new tab on vgchartz and clicked log out. Then I went to the previous tab and clicked create thread whilst logged out and this is what happened. Simples!
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right