Shows downloading twice

Newbie ex Sickbeard for 3 years.

I have set up Sonarr with one indexer (nzbsu) with RSS and search enabled and one profile used for all my shows ( default HD-720p) I use SABnzbd as my downloader.

The majority of new shows are downloaded twice but in all cases the same show nzb is used, so it it’s not related to a quality upgrading. Why is this happening?

e.g
EXtract from sonarr log for Big Bang Theory. No other entries appear for this show.

15-2-20 02:13:55.3|Info|Sabnzbd|Adding report [The Big Bang Theory S08E15.720p HDTV x264-DIMENSION] to the queue.
15-2-20 02:13:55.8|Info|DownloadService|Report sent to download client. The Big Bang Theory S08E15.720p HDTV x264-DIMENSION
15-2-20 02:13:55.8|Info|RssSyncService|RSS Sync Completed. Reports found: 100, Reports grabbed: 1
15-2-20 02:24:30.8|Info|RecycleBinProvider|Recycling Bin has not been configured, deleting permanently. O:\Plex Media\TV Shows\The Big Bang Theory\Season 08\The Big Bang Theory - S08E15 - The Comic Book Store Regeneration.mkv
15-2-20 02:29:01.6|Info|RssSyncService|Starting RSS Sync

screen shot from Activity->History

screen shot from SABNZBD downloads

This only shows one grab for Sonarr, doesn’t look like it is grabbing it twice, but rather something else. Is there another application/system sending nzbs to SABnzbd? SB/SR/SG or watchlists on your indexer?

Whoops!!! My bad. I removed Sickbeard from autoruns but I must have forgot to shut it down. It was busy snatching episodes in the background. Thanks.

Great product by the way.