[CentOS] yum search prints 13 times the same package results

Hi all

Why "yum search" prints 13 times the same results? I enabled according 
CentOS wiki the RPMforge repository.

# yum search youtube-dl
Loading "fastestmirror" plugin
Loading "priorities" plugin
Loading mirror speeds from cached hostfile
  * rpmforge: ftp-stud.fht-esslingen.de
  * base: mirror.widexs.nl
  * updates: archive.cs.uu.nl
  * addons: mirror.widexs.nl
  * extras: mirror.widexs.nl
274 packages excluded due to repository priority protections
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com
youtube-dl.noarch : Download videos from YouTube.com

regards
Sven