While Terri is speaking to her unexpected guest, a pan is on the cook top containing what are apparently two glass baby bottles inside for sterilization. She returns to the stove and the bottles are on the counter.
When Colin wrecks the truck and the tree branch goes through the windshield, while he is in the truck the wipers stop (branch in windshield). When he gets out you see the wipers still working.
When Terri is pulled over by the police officer, Collin's window on the passenger side changes from open, to shut, to halfway rolled down, to shut and then he finally lowers it when Terri leaves the car.
When Colin and Terri are in Alexis' bedroom, Terri leans against the bathroom doorway holding the basket of first aid supplies in the first few scenes that cut back and forth from her to Colin, then the basket is next to her on the floor when it should still be in her hand, and then it's back in her hand again in the scene after that.
Colin is an escaped convict, he murdered two correctional officers while escaping from state custody. There would be a nation wide manhunt for him, his picture and information would be all over the news and social media sites and there would advisories on the radio in Tennessee, the surrounding states and the whole mid to lower east coast. Alexis, Colin's ex girlfriend would have been notified by the police of his escape and even possible had a police car posted at her house. Yet she is completely surprised when she sees Colin in her house. After Colin murders Alexis he leaves her body where he killed her and then later returns with Terry and her children. It is very unlikely her body laid there undiscovered for such a long period of time, a police officer would have found her body before Colin returned, since she would be someone the cops would be watching because of Colin's escape.
At the beginning: The guard in the rear compartment of a prisoner transport van would never be armed.