I have a Kindle Oasis 9th ed. I've been having the same problem with my email address showing up as the author. Up until about 30 minutes ago, I have spoken to 7 different cs / tech support reps. Tonight, they are escalating it - again

Of course most of them have said it's because they have certain security measures in place and that makes it a Calibre problem. I tried sending an email to an old address I have for Kovid Goyal but the address is no longer valid. (Anyone have his address?)
Has anyone also had the problem with trying to 'Remove Download' from Downloaded books to ALL or the Cloud and getting a message asking if you want to DELETE this Document instead of Remove it? It doesn't move the book to the cloud, it completely removes it from everywhere.
Don'tCha hate it when an update screws up a good system?