This episode takes place in Minnesota in mid-February, yet there is no snow on the ground at all, not even when they go to the cabin in the middle of the woods. In February in Minnesota there would be a lot of snow, especially in the middle of the woods.
When the team finds Sabrina gone, it clear that her mother released her from the handcuffs by bashing them with a heavy hammer. However, the handcuffs are still attached to the rail in the fireplace. She hit the cuff that was attached to Sabrina's wrist, risking severe injury. Moreover, the metal rail isn't particularly sturdy so the handcuffs could easily have been removed, and more quickly, by smashing the rail away from the fireplace.
At the end the agents are pursuing a single suspect armed with a single handgun, and they are being supported by a SWAT unit. Yet for some reason they are armed with MP5 automatic weapons, which they rarely use and when they do its due to going after multiple subjects that are heavily armed.
The abductor puts duct tape over Sabrina's mouth to keep her quiet, yet she is still cuffed hands-front. She can just take the tape back off.