Problem with re-assigning artist name in 1.0b18-pre2

I've been playing around with this latest release of NetJuke and
everything looks good.  I always try to clean up my music by mapping all
the variations on an artist's name (i.e., Jim Rodgers, Jimmy Rogers,
Jimmie Roger) to the correct spelling.  Normally I'll do this through
the batch edit feature, but in 18-pre2 I noticed that every time an
artist's name appears it has a nifty 'Edit this Artist's Information'
button.  Great, I though, much more efficient than the old way -- I'll
just go into this dialog and change the entry from the incorrect
artist's name to the correct name.  However, I noticed I was losing
access to all the files on which I performed this operation --
investigating the database, I noticed that the ar_id was 'orphaned' (no
entry on the NetJuke_Artists table) and this was the cause of the track
disappearing from NetJuke.  Have I misunderstood the intended
functionality or is this a bug?
 
Mark