Hoping someone can explain what is probably fairly obvious...but confuses me.

Imagine two users with admin privileges on our server (Mac OS X Server 10.5). Call them joe & bob.

both users are members of these groups:

 Staff       Group ID: 20
 Workgroup   Group ID: 1025

Shared folder "devfolder" has sharing set as so:

POSIX:

 Owner: joe     read & write
 Group: admin   read & write
 Other          no access

ACL:

 Workgroup  Allow  Read & write

Question is why when looking at same folder does the ownership appear to change depending on who's doing the looking?!? Both looking at same folder on the server:

From Joe's perspective:

xserve:devfolder joe$ ls -l
drwxrwxr-x   6 joe  workgroup    204 May 20 19:32 app
drwxrwxr-x   9 joe  workgroup    306 May 20 19:32 config
drwxrwxr-x   3 joe  workgroup    102 May 20 19:32 db
drwxrwxr-x   3 joe  workgroup    102 May 20 19:32 doc
drwxrwxr-x   3 joe  workgroup    102 May 20 19:32 lib

And from Bob's perspective (folder mounted on his machine via AFP):

bobmac:devfolder bob$ ls -l
drwxrwxr-x   6 bob  _bob    264 May 20 19:32 app
drwxrwxr-x   9 bob  _bob    264 May 20 19:32 config
drwxrwxr-x   3 bob  _bob    264 May 20 19:32 db
drwxrwxr-x   3 bob  _bob    264 May 20 19:32 doc
drwxrwxr-x   3 bob  _bob    264 May 20 19:32 lib

Now if Bob connects to server via SSH then his output is identical to Joe's, as expected.

Can anyone tell me what the client is doing in this case and what should be expected when bob creates or updates files in this folder? What tools do I have to better understand this from the command line? Is this normal? Perhaps a "cleaner" way that wouldn't be confusing with "bob _bob"?!?