Album not updating when score changes
I'm just use an album for the first time, and I'm confused. I added seven scores to the album and successfully printed to PDF. I then used the "Join Scores" button to create a new mscz file (successfully, though I have not used the result). Nothing changed in the Album Manager dialogue, and the "Join Scores" button remained enabled, and my seven scores were still listed (not the single joined score). So at this point it seemed reasonable to think my album was still pointing at the seven original mscz files(?).
Then I made some changes to one of the scores (e.g. to drop some texts that were no longer needed when the score became part of an album). These changes were definitely saved, and I verified they were visible in the online version too.
I closed the score, and re-opened the album, then re-printed to PDF expecting my changes to be visible in the result - they were not.
I re-read the help page about albums for clues - none.
Am I correct in thinking that the moment a score is added to an album, its contents are somehow imported into a place where they can no longer be edited? And that to make a change it is necessary to drop the score from the album and then add it again?