Other mistake: As Bink's dad looks at the ransom note, the note says "Mr. Cotwell, we have your baby. Put 5 Million $ in a trash bag in the alley behind the Ovaltine factory. No police." Then there are dramatic zoom jumpcuts on parts of the letter, ending with "By midnight." But that last part was not in the note at all. (00:15:00)
Other mistake: Veeko has a hard landing on top of the elevator at the construction site. It's shown when the camera pans up to him, that the elevator doors are vertical scissor gates that open sticking out of the cabin, we see the actual door going up and being lowered to close the gates. Few moments later he is crawling with his body between the cabin and the floor and yet new workers get into the elevator without pushing the gate door up into his stomach. (01:15:55)
Other mistake: The girder is being already lifted when Veeko finds him; he has still to talk to his buddies outside, and they need to get into the construction site, look at him. Before they go to the elevator and take it, more than a minute has elapsed but the girder has gone up just a handful of storeys. (01:09:20 - 01:10:15)
Other mistake: Veeko flips away from the descending elevator, is shown falling almost vertically on his back, and yet in the close-up behind him there's no elevator pit/outside of the building, but a solid inner part of the floor with people doing some construction work. (01:16:20)
Other mistake: The big lady and Veeko himself barely fit in the space between the building and the van, which are aligned. Yet Veeko has to just turn on the left to get a good visual of the lady who is now at the other side of the van itself. (00:32:45)
Answer: It might have taken a while for them to find the keys to the crane as well as figuring out how to operate it. Once they did, they could get him down.