After Billy urinates on Steve Shaw and the lawyer in the bar, different shots do not show any urine on the floor or table where they had been sitting.
A Coke vending machine is clearly labeled ten cents. In this part of the country in the late 1940s it would have been five cents. Around 1960 vending machines went to six cents, quite a novelty at the time, requiring two coins to get a Coke. It was later in the 1960s when vending machines finally went to ten cents.
The $1 and $20 bills seen at the poker game are of much newer issue than the time period depicted in this film.