Ok, now I'm convinced there's something wrong whit the DC's person number required.
I ordered a new plane, Dassault Mercury, which has a crew demand of 3 pilots and 4 cabin crew, compared to the DC 8-62's 3/6.
Before this order, I had some 20-30 pilots needed, now I have 38. Cabin crew before was 41, now it is 59. The Mercury has 4 routes, Douglas only 1.
So, even though I don't correctly remember the amount of pilots I had, I am totally sure about the CC amount. And looking to that, it raised by 19 persons, meaning that Mercury requires 18 CC, and Douglas a huge 41 (!). This even though Mercury has 4 times more routes. It has to be said, though, that Douglas flies over night, an over 9 hour flight, but Mercury only 2 hour hops, and not during the night. So does flying over night affect CC amount?
So, Mercury needs 66% of the CC the Douglas requires. If Mercury requires 19 CC, Douglas should require 29, not 41 CC. And even if the routes and other stuff affects, the difference shouldn't be that big.
Now, since I am not 100% sure if this is a bug, a wrong thing, or works just fine, I'm going to post it here. If you find that this needs action, move it to somewhere else,or tell me so I move it.