Johnny Cakes - S6-E8
Continuity mistake: When Tony and Julianna are sitting down to sign the contract, he picks up a pen that is lying on top of the contract. Immediately there's a cut to the contract with the pen still lying on top of it. (00:48:00)
Continuity mistake: After the fight between Tony and Bobby, Tony has a large blood stain on the front of his T-shirt and he passes out. The next morning Tony wakes up the blood stain on his T-shirt is significantly smaller. (00:32:00 - 00:34:00)
Continuity mistake: When the FBI dude follows Tony outside to talk to him, Tony's Escalade is visible behind Tony. When they cut away to the next shot and then back at Tony, there's a red Jeep where his Escalade was. (00:08:05)
Continuity mistake: Tony and Paulie rent a boat. After they cast off and get underway, Paulie is standing at the aft of the boat, not moving. Behind Paulie, there's a closed door with the boat rental information posted on it. As the boat continues to head out to sea, in the next shot of Paulie, the door is now open, but he is standing in the same spot. (00:45:20)
Answer: That's not Jimmy, just a look-a-like. Jimmy's short and stout, the guy in "Christopher" episode is tall and medium built. The hair is also different.