Other mistake: Bella sits and talks to a resident in the rec centre. The man shows intermittently in the background (left side) repeatedly wipes the same two glass shelves. (00:07:22 - 00:08:50)
Continuity mistake: Bella juggles her keys between her hands and walks towards the motel door. Her shoulder strap/purse is on her left side, but is on her right side before she reaches the door. Bella tries fitting the key into the doorknob slot, and her shoulder bag suddenly goes from her right to her left side. (00:09:25)
Trivia: Hanging onto Christmas traditions may not be the only theme in the movie. Hank's building is located on "S. Industrial Av." Interspersed among vast Christmas decorations are signs for traditional oil/gasoline companies, including "Standard Oil", "Pennzoil", and "Keystone Gas." There is even a "Firestone" sign - it takes several gallons of oil to make one tire. Ironically, electric toy trains are traditional. (00:37:50 - 00:42:32)