I played around and while I can get 1, 2 to work, I can’t get 3. it always removes the authors, no matter what I do. I think there is a bug. if I select short form for consecutive footnotes - it at least keeps the author, but also keeps the short title :-(
I think you should contact the tech support team and have their developers look at it (and ask them to create a proper Chicago 17th output style handling of repeated and sequential footnotes per the newest guidelines).