Site database backup filename may not match database name

[RationalPolymer]

Is it normal where a site/domain backup with a database has a database tar file whose name is similar but different from the actual site/domain database name? For example: 'blogs_wordpress_3' database but 'blogs_wordpres_8' database backup filename.

The backup INFO.xml file will contain both names so there doesn't appear to be any problem with backing up and restoring the same/proper/expected database, but it is somewhat confusing when looking at the backup files and seeing a difference in the database filenames versus the database name.

If this is "normal" then how/when/why does it occur?