As far as I know, there's no other way to tell if you've already added a story to another list if the first one is already full. That’s why I always leave one spot open so that there are at most 199 titles in a list and I add titles that I’m not sure are already on another list to that list and then it shows whether that title has already been added (as you already know). It’s a bit inconvenient, but I don’t think there’s any other option.

I want to know if there is a way to tell from the story page whether I've already added that story to my list, without going to or searching the list itself? The reason is that I just found out that Mangago has a limit of 200 per list. When I used to add a story it would pop up a duplicate notification but now since I have to create a new list, it won't announce the duplication if it was. I’m one of bato migrator so we used to be able to see on the story page if it had been added to what “album” or list without me going to search my list. Thanks! (づ ̄ ³ ̄)づ