Continuity mistake: After Mac betrays Indy again, and Indy asks him if he's a triple agent, Dimitri suddenly appears next to Mac before Spalko enters the room.
Continuity mistake: While the soldiers are loading the coffin inside the jeep, you can see Spalko on the left side of the jeep, handing his rapier to Dovchenko. In the next shot, she is next to the back of the jeep with the rapier again and repeats the handing action. (00:11:39)
Continuity mistake: The Russian convoy consists of one staff car, two jeeps, and three trucks. When the convoy arrives at Hangar 51, a second staff car has appeared, from which Irina Spalko steps out. (00:02:44 - 00:05:50)
Continuity mistake: While the staff car and the black car are racing, there's a wide shot of the place, with only the road and some mountains in the background. In a few shots later, the Atomic Cafe has appeared from nowhere. (00:01:52 - 00:02:20)
Continuity mistake: When Indy asks for shotgun shells, behind him are, from left to right, Ivan, Spalko, Dovchenko, and Mac. Just behind Spalko, stands Roosevelt. But, when Indy asks for pliers, Roosevelt appears next to Indy, Spalko has moved to the right side of the group, and Ivan has disappeared. (00:09:57)
Continuity mistake: Dovchenko smiles and raises his pistol. In the next shot, he repeats the action. (00:13:34)
Chosen answer: Because the film had a global release date, and premiered the same day in every country in the world. Obviously, the studio felt this was the best day to do it.
Twotall