When Liz (Jenny Wade) burns her arm the injury is clearly visible on her left arm. Later after the ambulance arrives and attends to her wounds the bandage is on her right arm.
When Dan is in the closet, Liz falls asleep but, when Jack goes to open the closet, the bed is empty.
When Jack goes to open the armoire to let Dan out, the bed is empty but Jenny was there in the shot just prior.
When Liz rescues the guys from the fire, she says she got a burn and it is on her left arm. Later, when she walks away from the MEDIC truck, her right arm is wrapped.