The scene when Carter is talking to Sarah one last time, there are fallen fall leaves blowing around. However, as the camera pans around the landscape, all of the trees and bushes are shown to be green and show no signs of the season being fall.
In the scene where Paige and Sarah are having an ice cream together, signs from nearby stores are faintly visible near the top of the screen. Near the end of the scene, the logo for "Canadian Tire" is clearly visible. Canadian Tire only has locations in Canada, even though the scene is set in Michigan.
When someone is suffering from acute neutropenia (a common low white blood count following chemotherapy), as is the stated case after Sarah is rushed to the hospital upon collapsing, she would be kept in an isolated environment and her family would not be free to just run into her room off the street and collapse onto her bed, hugging her. At the very least, they'd be gloved, gowned and masked to guard against the spread of infection to the patient.