I really don't know what's going on atm. First there were reports that Thiago was injured and the fight was off. Then he confirmed he's okay and the fight was on. Then came the testing thing and now it's Rashad-Rampage again?
My guess is the rumors that the fight was off and the site reporting didn't know why so they made up BS about him being injured and posted the story. And Thiago may not have known he was out of the fight until it was already official. He may have been the last to know, thats how it works sometimes in a business when you piss off your bosses.