When the Japanese fighters attack the bomber, we can clearly see that there are five of them. Foxie also confirms there are five enemy planes, and the planes are counted during the attack as they are shot down by the gunners. But when we cut to a close-up of the Japanese pilot, more than five planes can be seen on the far side of his fighter.
When Sgt Davis is firing at the clay targets and being marked as misses by Sgt Pattis, when Davis hits the targets break up and pieces start to fall, then suddenly vanish. The two shots are fired are identical. Apparently a rear screen shot that stopped.
'Gadget' addresses Pattis as 'Sir'. Pattis is a sergeant and should not be addressed as 'Sir' but as 'Sergeant'.
When T/Sgt. Davis first shows up to gunnery school he is already wearing air crew wings, that he will be awarded at the end of training.
It seems odd that Davis would be a Tech Sergeant, just like Pattis at gunnery school. He should have been a lower rank. Also, he mentions being commissioned after gunnery school. The Army is not going to send someone to flight school after they have spent the money to have him trained as a gunner when those positions were needed during the war.