Why don't they want to move?

https://preview.redd.it/tmegdutl9w4g1.png?width=1919&format=png&auto=webp&s=304265d8a03a909f85a4e941317600072fad5535

I've found every single flea and done everything else in Act 2; as far as I can tell, the only thing left for me to do to get to Act 3 is make them move to >!putrefied ductts!<; I've found >!pale lake!<in case that's a requirement for them to go to grand gate but I don't think it is