When you add a book to calibre, it attempts to read the metadata from the file. If that fails, then you need to set the metadata manually. The steps would be:
- Transfer the book into calibre
- If you loaded the book from your Kindle, delete the book on your Kindle.
- Edit the metadata in calibre
- Click 'Send to device' to transfer the book with edited metadata to the Kindle.
If that's what you're doing, and the book is not showing up on the Kindle with the corrected title/author, please report back with the steps you took and the results.
G