by Kes » Sun Nov 23, 2014 6:17 am
Fortunately what you are describing is not a bug, or a fault.
You have misunderstood the nature of the quest. If you look in your Quest Journal it tells you that you have to give him a total of 20 rat meats and you will receive 8 cooked meats in return. As you only had 7, he has taken 5, given you 2 cooked meats and told you that he needs more. So the quest is working as intended.
As it says in the information bar when you select Encounter Rate changing the rate is for invisible enemies only. Is that what you have chosen? Also, the number shown is the average number of steps that need to be taken before you have an encounter; so moving it to 40 does not put the rate up, it puts it down, as they become less frequent.