I've never had that happen so I'm not sure why you database is doing it?? Except perhaps when I've removed a line manually and didn't leave a line break at the end.
Try adding a line break at the end of the last entry and then add another reord and see if it still saves it on the one line.
What modifications have you made to the files, other than setting up your .cfg, and the layouts for adding and viewing records?
Was the database created only using DBMan or have you used another program to enter or modify any of the records?
Unoffical DBMan FAQ
http://creativecomputingweb.com/dbman/index.shtml/