Laura goes back to her house and puts Rose in a basket on the kitchen counter so she can feed the cat. She hears something, goes to the door and sees the tornado. She runs to get Rose, but she's in the wooden cradle Charles made instead of the basket. After Laura grabs her, she turns and it's the basket again.
Just before Laura opens the door to see the tornado, you can see that the back of her shirt is tucked in. As she picks up Rose, her shirt is untucked, then as she calls up the stairs for the cat, it is tucked in again.
When Almanzo first walks with the cane, he is holding it on his left side. That is wrong. He should be holding it on the opposite side to his bad leg.
When a tornado damages a home, it either rips the roof off or portion of the second story. If it takes the entire house it would be laid out in a swirl. It would not be damaged in the fashion shown.
The ending scene shows the construction of the old house which had finished 2x4s. Something you would see in modern framing. In the late 1890s it would have been rough sawn wood not finished.
As Laura rushes upstairs to get the cat during the tornado, her left hand touches part of the wall. It jiggles when she lets go. Obviously part of a set.
Almanzo has belt loops on his pants. Belt loops weren't invented until 1922.
In the scene where Caroline is driving the wagon to Laura and Almanzo's home, modern tire tracks can be seen to the right of the wagon.
The statement was made that at least Laura and Almanzo had the land but when a bank forecloses the land is gone too. Close but no cigar.
Who runs back upstairs to get a stupid cat when a tornado is smashing your house to bits? This scene was almost as replete with stupidity as Almanzo's shenanigans previously.
No explanation is given for what became of Almanzo's horses that weren't paid for or how they paid that debt.
As Laura looks out at the tornado, the shadow of the boom mike is visible on the wall behind her.
Only writer Chris Abbott would have Laura break a treasured heirloom bread plate in a fit of rage and break her mother's heart.