Hull's quest and how reaction is calculated
I've just started a new playthrough with a 16 charisma chaotic good character and returned Hull's sword. Surprisingly he didn't complain about how long I took and he gave me 20gp instead of 10gp.
As far as I'm aware this shouldn't be possible should it? I've used the same character before and it's always been 10gp. Is there a timer involved in the quest, or is there a random element involved in calculating NPC reactions? I was under the impression that the supposedly random element of determining reaction scores is actually fixed at 10 and so unless reputation or charisma changes, the result should always be the same.
Not a big deal really but just curious if there is part of the game mechanics that I've misunderstood.