Continuity mistake: When Savannah pours the wine during supper the glasses are around 1/4 full and when the angle changes the glasses are about 3/4 full.
Visible crew/equipment: In the scene where John asks Savannah what to do, you can see the mic.
Continuity mistake: When John gets shot, his rifle goes from being an M4 into a SAW, then back to an M4. You can see the link dropping from the SAW.
Continuity mistake: During the party at Savannah's parents' house, John is handed a bourbon. Then in the next angle he is handed the bourbon again.