Question: At the briefing it's pointed out that there's a hospital, school, etc. around the factory they're bombing, and Dennis is very adamant about getting the bombs "right in the pickle barrel" so a lot of innocent people don't get hurt. But the planes are spread out over a large area in the sky, and are also moving when the bombs are dropped, so wouldn't the bombs land over a large area and not just in the limited vicinity of the factory?
Answer: Even with the Norden bomb sight, during WW2 bombing was generally very inaccurate.
Chosen answer: It would seem that every plane's Norden bombsight would drop from different angles, etc., each designated for a common target. So, 2 planes could be higher, lower, ahead or behind the target and each hit the target, if the bombadiers had an accurate fix on the target.