I haven't experienced this myself, having gotten the rewards on the character I'm using, but I've seen some people (including a friend of mine) complaining on Atlantic that they're getting looting rights to Sicarii, but not receiving the Spinneret and Venom Sac. They've done everything the quest requires. Also, for some reason we can't figure out, my friend is unable to return to Sicarii's room. He got in once and now the password does nothing. Any others experiencing this?