When the probation officer gets her food, the bacon on her plate is directly in front of her. When she tilts the plate to show Leo the frowny face Willa made with the food, the food is facing the other way, and when she sets the plate back down and the camera cuts to the other angle it's facing the original way again, all without her having rotated the plate.
Walter's military file showing the date he was discharged says he was discharged on "12/22/09" - however the file is formatted in boxes labeled day then month, so it should say 22/12/09.
The holster on Isabels (Mercedes Mason's character) back is upside down you can see it as she walks towards the building to arrest the escaped convict in the cockfight.