Dr. Quinn did not shave Hank's hair during the procedure.
Some of the men have belt loops on their pants. Belt loops weren't invented until 1922.
There is a multi color wall calendar on the exam room of the Clinic. These items were not manufactured in 1871.
Dr Mike's mother raised several children of her own. She should've known sending a gift to only one child when it wasn't their birthday would have caused petty jealous squabbles. Bad grandma.
Colleen must have forgotten that Elizabeth Quinn gave her very valuable silver mirror and brush set. Brian did not receive a present at that time.
Dr. Quinn says that Brian and Colleen lost a father and a mother. They are not orphans. Their father is still alive. They know where he lives.
None of the key townsmen are wearing hats at the engagement party. It is a formal event and outside. They should be wearing hats.
Dr. Quinn is blind to Sully's actions.