When the sheriff tells the captain the crime, he says Nick & Heath rustled a steer. A steer is a bull that has been castrated. Nick & Heath bought a bull for breeding purposes. Nick says so a couple moments later.
The model of Cutty Sark in the Captan's/warden's office is made of plastic.
Captain Rizely has a model of the clipper ship Cutty Sark in his office. This ship wasn't launched until 1879. The series was supposed to have taken place between 1874 and 1878.
It was established in the first season that the year was 1884. Cutty Sark's maiden voyage was 1870.
The two previous entries are wrong. The ship was in existence by 1876-1880, over the series 4 years.