When Julie Andrews' character wheels the baby (James Garner's character's new-born grand-daughter) in to the mother's room for a feed, the crib on the trolley is empty in the first shot filmed from inside the room as she enters.
When the camera cuts to the baby's crib in the nursery the newborn is identified as Marybeth Campbell and the mother as Lori Woodward, which is her maiden name. Earlier in the movie when Lori is calling the hospice she identifies herself as Lori Campbell.
The road down which James Garner and Julie Andrews ride on the tractor obviously has been plowed, even though Garner says that it hasn't been. Also, the tractor was free of snow; and in that blizzard, it should have been half-covered when they found it. The amount of snow on the ground is the ultimate unreality, as it would have taken hours for that much snow to have fallen and to drift that much.
When James Garner breaks into the cabin, it takes him only a couple of seconds to get to the front door and open it for Julie Andrews. It should have taken a lot more time, as he would have had to climb into the broken window and cross the floor. He also says that he has checked the phone and found it was dead. He simply would not have had the time to have done that.