Factual error: At an 1868 church service, Mark sings "How Great Thou Art." While the tune of this hymn is 19th Century, the English lyrics he's singing weren't composed until the 1920s.
Factual error: In the first minute of the episode, there is a herd of wildebeest shown instead of bison, entirely wrong for the area. (00:01:00)
The Candy O'Hara Story - S4-E11
Factual error: The characters visit Aurora, Colorado. The series takes place in 1860s-1870s - at the time it was named Fletcher. (00:06:25)
Factual error: The wagon master is sitting drinking a cup of coffee, and he has two bandaids on the first and second finger of his hand. Bandaids were not introduced until the 1920's.
The Isaiah Quickfox Story - S8-E17
Factual error: At the end of the show Robert Fuller told Charlie the bat he had been a fruit bat. There are no fruit bats in North America. Their habitat is Australia, Africa and Asia.