[ClaytonN]

The answer is pretty simply. The "Holecard cam" is on Chris Bigler while the main camera is on Darden.

As to the WSOP thing, there's been like 3 seperate instances pointed out where hands were faked.

One that definitely was spliced up badly was the Hellmuth/Tony D hand in 2003WSOP. Board had two jacks and a king on the turn, and Hellmuth had 77. Tony D had JT. Tony made a sizeable bet, Hellmuth raised, and Tony D folded. Except when the camera is on Tony D, he's not holding chips, but when it gets to his hole-card cam you can clearly see him holding a stack of chips in his right hand.

It's all on Paul Phillip's page in greater explanation.