pup/yum updates package, but it doesn't get updated

[David Timms]

With current dev tree having unresolvable for a full update, I wanted to 
get as many of the current updates as possible. So I deselected the 
problematic ones, and I was left with about 12 packages to do. I then 
tried each of these in term, and found that rhgb was resolvable, click 
update, pup initiates download and then installs the package, without 
error, finishing with an OK button that closes pup.

Starting pup again, it finds all 12 packages as still ready for update, 
including the rhgb package that it just did:
(pup detail for rhgb)
rhgb - 0.16.2-21.i386 updates rhgb - 0.16.2-20.i386

# rpm -q rhgb
rhgb-0.16.2-20

# ls -l rhg*
-rw-r--r-- 1 root   root 142230 Jan 26 07:08 rhgb-0.16.2-21.i386.rpm

# cat /var/log/yum.log

Jan 29 20:08:33 Updated: vixie-cron.i386 4.1-50.FC5
Jan 29 20:08:41 Updated: gnome-power-manager.i386 0.3.4-2
Jan 29 20:30:45 Updated: rhgb.i386 0.16.2-21
Jan 29 20:31:34 Updated: rhgb.i386 0.16.2-21
Jan 29 20:32:17 Updated: rhgb.i386 0.16.2-21
Jan 29 20:33:50 Updated: libgnomeui.i386 2.13.3-1
Jan 29 20:33:54 Updated: libgnomeui-devel.i386 2.13.3-1
Jan 29 20:34:38 Updated: avahi.i386 0.6.5-1
Jan 29 20:34:39 Updated: avahi-glib.i386 0.6.5-1
Jan 29 20:35:10 Updated: rhgb.i386 0.16.2-21
Jan 29 20:36:41 Updated: kdepim.i386 3.5.0-1
Jan 29 20:40:21 Installed: junit.noarch 3.8.1-3jpp_6fc
Jan 29 20:40:29 Updated: eclipse-rcp.i386 3.1.1-1jpp_16fc
Jan 29 20:40:34 Updated: libswt3-gtk2.i386 3.1.1-1jpp_16fc
Jan 29 20:41:24 Updated: eclipse-platform.i386 3.1.1-1jpp_16fc
Jan 29 20:41:30 Updated: eclipse-ecj.i386 3.1.1-1jpp_16fc
Jan 29 20:41:47 Updated: eclipse-jdt.i386 3.1.1-1jpp_16fc
Jan 29 20:44:22 Updated: gnome-desktop.i386 2.13.90-1
Jan 29 20:44:23 Updated: gnome-desktop-devel.i386 2.13.90-1
Jan 29 20:45:45 Updated: rhgb.i386 0.16.2-21
Jan 29 21:32:45 Updated: rhgb.i386 0.16.2-21

The yum log actually shows the same version getting installed multiple 
times!

I guess some error message is getting hidden by either yum or rpm when 
this update is performed, but how can I see it ?

Also is there further info to retrieve before trying
a: yum update rhgb
b: rpm -Uvh rhgb*
??