Early on Davis loses his hat to a young boy and is seen chasing him around the Cruiser. At the end of the episode Karen asks him where his hat is and he says, "Never mind," suggesting that it's still missing. But in between these two times, when Hank attempts to "hang out" with Davis while he's sitting in the cruiser, his hat is clearly visible on the dashboard.
When Brent and Karen are hanging out and Hank walks in to join them, a car pulls up to the pump behind Hank's shoulder. The gas bell rings twice, but the car has clearly stopped before the gas bell rings.
When Hank is temporarily calling Bingo, his last call begins with "under the L". There is no "L" in BINGO.