What's the difference between using the -n and the -r -n options?

When I use the following ASA 8 command at the command prompt

dbbackup.exe -c dsn=ABC;uid=MyID;pwd=MyPassword; -r BackupTest

the database backup (ABC.db; 11,108KB) and the
transaction log backup (named 030708aa.log; 192KB) are put in
C:\MyDocuments\ABC_db8. Not too surprising since dsn ABC
says the database is in C:\MyDocuments\ABC_db8. Actually I
thought it was supposed to it in C:\MyDocuments\ABC_db8\BackupTest,
but we'll come back to that in a moment.

The next time it's executed it puts the database backup
(ABC.db; 11,108KB) and the transaction log backup (named
030708ab.log; 192KB) in C:\MyDocuments\ABC_db8.

When I add the -n option thusly

dbbackup.exe -c dsn=ABC;uid=MyID;pwd=MyPassword; -n -r BackupTest

the same results happen. Is there supposed to be a different result or am
I misunderstanding the documentation?

TIA,
Confounded