I am having this same issue with Negan and tried adding the code but it's on later lines than the ones listed. He still only takes 2 at a time, giving 5 fuel cans, but never updates the quest. I've attached my save. I'm currently using the .33a version of the HTML.I dont know much about code but.. I used control F to search the first line and copy pasted over that section when i reopened the game I turned in 2 slaves left come back with 4 more it allowed me to choose the bring him slaves option and updated the quest thank you