At the family graveyard, a tombstone for John's brother Ben, who was killed in WWI, is seen. In later episodes it's established that Ben was buried in a veterans' cemetery overseas.
The scene at Godsey's when John Boy buys silk thread for Olivia Ike tells him the total for his order is $10. Ike should have said ten cents. However, there are many times Ike exaggerated the order total. He would say the total was 97 dollars instead of 97 cents. The family would just go along with it and pay him instead of correcting him.
John and Yancy are supposed to be fishing in the Rockfish River, but the water has no current; it's completely stagnant.
Esther and Zebulon discuss how they sat on the hill together when Esther first found out she was pregnant with John. But in later episodes, Esther says that she found out she was pregnant with John whilst Zebulon was away serving in the army.