When Jackson wakes up Matt by throwing a bucket of water at him, Matt soon removes a patch from his forehead, no visible wound on his head. For the rest of the movie, though, there is a prominent cut on Matt's forehead, where the patch was,
The "mothership" is shown to be no more than 1km high in altitude, yet the following shot shows it being in orbit looking down onto earth.
After escaping from the invasion at the football field and arriving at the "Casa de Destitute" (Old Timber Mill), Matt and Jackson are naturally in their football uniforms with sweat jackets. Concluding the first scene, Matt and Amelia walk towards the front door, as if about to exit.
In the next scene, Matt is sitting outside vomiting, well away from the entrance. He has his bottle of pills and is now wearing cargo pants, t-shirt, leather motorcycle jacket and work boots. Amelia walks out of the mill towards Matt and refers to the previous scene as if it just happened, asking Matt "You mean what you said in there?".
The next day, Jackson is now wearing cargo pants, a long-sleeve hoodie and boots.
In the next scene, Matt is sitting outside vomiting, well away from the entrance. He has his bottle of pills and is now wearing cargo pants, t-shirt, leather motorcycle jacket and work boots. Amelia walks out of the mill towards Matt and refers to the previous scene as if it just happened, asking Matt "You mean what you said in there?".
The next day, Jackson is now wearing cargo pants, a long-sleeve hoodie and boots.
During the end battle in the field all the AR15 weapons are firing but the ejection ports on the rifles are closed and no spent cases are being ejected.
Normally, name and service tags are sewn onto uniforms above the breast pockets of ADF personnel. None are seen in this movie.
COL Grant is always seen wearing her uniform with the top button done up. No ADF service (Army, Navy or Air Force), wears a camouflage uniform with the top button done up. Having the top button done up would be a very obvious indication that the wearer has had no military training in the ADF.
Colonel Grant is wearing Lieutenant Colonel rank insignia.
AT 1:21:00 the CO of the bolthole unit is introduced, LTCOL Grant. Any ADF member would be ridiculed for having the top button of their camouflage uniform done up. LTCOL persists in doing this for the remainder of the movie.
Hiding from aliens for many months in the bush and struggling to survive, Amelia and Isabella still keep their armpits clean shaven.
When baby Allison is being born (head first), Bella identifies her as female before the rest of her body appears.