Hi, I think I could help but may I ask if you can give specific questions? I can't explain it well otherwise
I i did read it again and understand now i only forgot is why they cant kill situ again?
Oh that's good then. As for Situ, uhm, I can't remember hahaha the only logical explanation that I can think of is because he is a part of the Situ family, who is like in alliance with the Duanmu family I think? and the Situ family can control evil spirits so killing that Situ guy won't yield better results; it's like reducing capable hands (though he's not in the head) who can deal with other evil spirits or something. I am not very sure about this as I can't really remember anything
i think you should try watching the anime. you'll understand it better then.
Hmm guys can someone explain me the 90+ chapter? It's confusing for me ;-; I dont understand any of those chapter