I don't know about other countries but in finland often programs have reruns within few days causing some autotimer to timer same event twise. This is quite usual especially with series.
Also you can try xxv. The docu is in german but we have also a english interface:
(German) http://xpix.dieserver.de/content/vdr/xxv/b_279_artikel.shtml http://xpix.dieserver.de/downloads/xxv/ http://www.vdr-wiki.de/wiki/index.php/Xxv
cu xpix