Nightly yam update and Dries repo

Every night for a little while now my nightly yam update job has been
pulling duplicate files from the Dries repo. I am seeing this in the
logs:

Fetch packages from
http://ftp.freshrpms.net/pub/dag/dries/fedora/fc4/i386/RPMS.dries/
Removing old file `BasiliskII-1.0-0.20050322.2.fc4.rf.i386.rpm'
Transferring file `BasiliskII-1.0-0.20050322.2.fc4.rf.i386.rpm'
Removing old file `SDL_gfx-2.0.13-1.2.fc4.rf.i386.rpm'
Transferring file `SDL_gfx-2.0.13-1.2.fc4.rf.i386.rpm'
Removing old file `SDL_gfx-devel-2.0.13-1.2.fc4.rf.i386.rpm'
Transferring file `SDL_gfx-devel-2.0.13-1.2.fc4.rf.i386.rpm'
Removing old file `SDL_ttf-2.0.6-0.2.fc4.rf.i386.rpm'
Transferring file `SDL_ttf-2.0.6-0.2.fc4.rf.i386.rpm'
Removing old file `SDL_ttf-devel-2.0.6-0.2.fc4.rf.i386.rpm'
Transferring file `SDL_ttf-devel-2.0.6-0.2.fc4.rf.i386.rpm'
Removing old file `a52dec-0.7.4-7.2.fc4.rf.i386.rpm'
Transferring file `a52dec-0.7.4-7.2.fc4.rf.i386.rpm'
Removing old file `a52dec-devel-0.7.4-7.2.fc4.rf.i386.rpm'.....


And it goes on and on. Any idea what is happening and how can I stop it
from deleting and then downloading files that have not, at least in
name, changed?

Many Thanks

My yam.conf follows:

### Configuration file for Yam

### The [main] section allows to override Yam's default settings
### The yam-example.conf gives an overview of all the possible settings
[main]
srcdir = /var/yam
wwwdir = /var/www/yam
arch = i386

## Clean up packages that are not on the sending side ?
rsync-cleanup = yes
## Exclude debuginfo or source packages ?
rsync-exclude-debug = yes
rsync-exclude-srpm = yes

## Clean up packages that are not on the sending side ?
lftp-cleanup = yes
## Exclude debuginfo or source packages ?
lftp-exclude-debug = yes
lftp-exclude-srpm = yes

## Do you want to share the ISO files in wwwdir ?
shareiso = yes


### Any other section is considered a definition for a distribution
### Below are a few examples to show the possibilities
[fc3]
name = Fedora Core $release ($arch)
release = 3
metadata = apt createrepo
iso = FC$release-$arch-DVD.iso
updates =
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/$release/$arch/
dag = http://apt.sw.be/fedora/$release/en/$arch/RPMS.dag/
dries=http://ftp.freshrpms.net/pub/dag/dries/fedora/fc
$release/$arch/RPMS.dries/
freshrpms =
http://ayo.freshrpms.net/fedora/linux/$release/$arch/RPMS.freshrpms/
newrpms = http://newrpms.sunsite.dk/apt/redhat/en/$arch/fc
$release/RPMS.newrpms/
misc = file:///var/yam/fc$release-$arch/misc/
##--  atrpms  --##
# stable
at-stable=http://dl.atrpms.net/fc$release-$arch/atrpms/RPMS.stable/
kderh-stable-fedora-3=ftp://apt.us.kde-redhat.org/linux/kde-
redhat/apt/kde-redhat/3/RPMS.stable/
extras=http://fedoraproject.org/extras/3/i386/

[fedora-all]
name = Fedora Core all ($arch)
kderh-stable-fedora-all=http://apt.kde-redhat.org/apt/kde-
redhat/all/RPMS.stable/

[fc4]
name = Fedora Core $release ($arch)
release = 4
metadata = apt createrepo
iso=FC$release-$arch-DVD.iso
updates =
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/$release/$arch/
at-stable=http://dl.atrpms.net/fc$release-$arch/atrpms/RPMS.stable/
freshrpms =
http://ayo.freshrpms.net/fedora/linux/$release/$arch/RPMS.freshrpms/
dag = http://apt.sw.be/fedora/$release/en/$arch/RPMS.dag/
dries=http://ftp.freshrpms.net/pub/dag/dries/fedora/fc
$release/$arch/RPMS.dries/
kderh-stable=http://apt.kde-redhat.org/apt/kde-
redhat/fedora/$release/$arch/RPMS.stable/
newrpms = http://newrpms.sunsite.dk/apt/redhat/en/$arch/fc
$release/RPMS.newrpms/
extras=http://fedoraproject.org/extras/4/i386/