When Jimmy calls "B12" and the scene changes to over his shoulder, before he places "B12" it is already in the board.
When calling the Bingo game Jimmy picks the 5 and places it in the board which causes the 5 on the display to flash. He picks another ball but then pauses the game to relate the Chicago Sunroof story. As Jimmy walks around the hall the 5 stops flashing and the 2 starts to flash, which shouldn't happen. As Jimmy completes the story the 5 is flashing again.
In the bar room scam scene, Saul (Bob Odenkirk) said that the Kennedy half dollar replaced the half dollar that had Lincoln's profile on it. This is not correct. Kennedy's profile replaced Benjamin Franklin's profile, which was on the U.S. half dollar from 1948 to 1963.