When you change metadata in Calibre, it does not automatically update the internal metadata in all of the saved formats.
- When you later Send or Save a format, Calibre does update the internal metadata (assuming you have that option selected.)
- One way to get metadata updated in the Calibre copy of a format updated is to convert that format to the same format.
Is there any difference between the result of option 1 vs. 2? I know option 2 can introduce additional changes - such as adding a cover page or removing a cover, controlling page breaks, removing header/footers, etc. Do these changes happen with option 1?