Alrighty so according to MMAJunkie, the fighters ARE signed to the UFC but the fight at Fight Night 27 has been nixed. They're still expected to add another fight to the card shortly though.
Maybe Campuzano in the place of one of the two guys?
http://thesportssoundoff.tumblr.com/Just a guy and another guy whining about sports. Give it a view if yer bored one day.