When Amber visits Gibbs' house, he offers her popcorn. From his perspective the level of the popcorn is well below the rim of the pan. In the next shot when Amber takes some, the popcorn is at or above the rim of the pan.
The goof item below may give away important plot points.
Jimmy Lancaster's confession will actually be worthless at his trial as it is the definition of a coerced confession. When he made his confession Amber was holding him at gunpoint and he was in fear for his life, meaning the judge will not allow his taped confession to be used as evidence at trial. Though his confession is still useful as an investigative tool, they now know to look for the money and if/when they find it that will be all the evidence they need.