When the Governor and Rick are talking before the final shootout,. Herschel and Michonne are on their knees in front of the fence, the close up shots show them about two feet from one another but the wide shots show them about six feet apart.
(at around 1 min) When the Governor is telling the camp he's going to take the prison, Hershel is setting the red plastic gas can down on the trailer. As the Governor hits Michonne in the face, there is a metal gas can behind the red one he just sat down that wasn't in the previous shot.
(at around 6 mins) When the Governor has Hershel and Michonne captive in the camper, he says, "You should eat, it's going to be a long day." He grabs a ration pack with his left hand out of his left coat pocket. But in the next shot he is giving Hershel the ration with his right hand.
At around 35:20 Daryl is pinned down between some of the Governor's men and some walkers, so he takes cover behind a filing cabinet, which are made out of thin sheet metal. It shows bullets hitting the cabinet (by the way bullets don't make sparks when they hit metal objects) but not penetrating it. As filing cabinets are made of either thin sheet metal or aluminum they would not stop a bullet from even a handgun, let alone a bullet from a AR-15 which fires small very high velocity bullets, they would of gone right through it and killed Daryl in an actual fire fight.
(at around 35 mins) When Sasha and Bob firing their weapons, Bob has barrel flash from firing the weapon but isn't pulling the trigger. Sasha pulled the trigger at one point but had no barrel flash. And neither of their guns mechanisms for ejecting spent shells are moving.
The tank used by the Governor's men is a Patton tank, which was retired in the 1990s.