Go to standby node with cli mode. Go /config directory and edit
Search search node '_auto_10.3.3.3' delete it.
Save n quit from file and reload bigip configuration. Hope you will not see node and ync device with active..
Well that's the oddity about this whole situation. The node doesn't exist in the bigip.conf. So I can't remove it from there. I've searched the entire bigip.conf file and no mention of this mysterious node shows.