The bald guy advances to the house was the hostage in front of him, while the woman and other man stay back. As they enter the souse, the woman is now behind the captive leading the foray into the house.
Desiree steps on a syringe that Joe asks her to use on her daughter. As she does so, one hears glass breaking. Syringes are not made of glass.
In the opening scene Josh Allister (Danny Ruiz) rests the barrel of a rifle on a log to take a shot, you would never rest a gun on its barrel or have anything touching the barrel when taking a shot as this upsets the barrel harmonics and can change the bullet point of impact.