Goofs

When Smoke and Stack are waiting for Hogwood early in the movie to buy the sawmill from him, they are casting notably different shadows while standing beside their car, revealing how the scene was spliced together from two different shots of Michael B. Jordan taken at slightly different times of the day.

When Smoke and Stack are waiting for Hogwood early in the movie to buy the sawmill from him, they are casting notably different shadows while standing beside their car, revealing how the scene was spliced together from two different shots of link=nm0430107 taken at slightly different times of the day.

Stacks is stated to have inherited his father's guitar before he came to Chicago seven years before the story takes place. The guitar is a Dobros Cyclops, which came onto the market in 1932, the same year the film is set.

While a version of the Molotov cocktail was employed unsuccessfully in the 1920s, the contemporary Molotov that Grace uses in the climax would not be widespread/in documented use until the Spanish Civil War in 1936, a couple years after (most of) the film's events in 1932.

Remmick and his minions perform a beautiful rendition of the modern version of "Wild Mountain Thyme" by Francis Mc Peake, which was not recorded until 1957.

Remmick's dialogue regarding the "Our Father" implies that Christianity was brought to Ireland by English conquest. In reality, Irish Christianity not only predates the arrival of the English in Ireland, but the existence of England as a kingdom.

-SPOILERS*

Several characters, such as Mary, are invited into the building after they have turned into vampires, and even though they leave, they don't need to be invited in again. There was no need for those particular vampires to wait outside with the rest whilst the survivors tooled up with weapons.