Many of my books are series. I normally add a prefix to the "title" but not the "title sort" so I will read in sequence. When you change the title within Calibre does it change the internal title in the book so it will show up on the Kindle? I normally do a conversion, even if to the same file type to be safe. Is that necessary?
I have basically the same question with the cover. Does changing it in the metadata change it in the book or is a conversion required?
BTW: I use the SendToKindle app to transfer books rather than using Calibre.