I am the marshal of the North and we managed to make Kings Landing surrender, but now Robb won't give himself the city and crown himself king instead he gives it to me regardless of what I do, if I decline I fear he might give it to another lord, what should I do?
There's no code for the mod to guarantee that the faction leader takes King's Landing. If you don't accept it, another lord will probably be awarded King's Landing. The mod treats it like any other fief in regards to who gets it.
That's fine, I was suprised because in all my other playthroughs the Faction Leader always took Kings Landing, I'm just gonna leave the North once the Red Wedding happens and hope for the best :-[