Sonarr download 2 copies of series

Sonarr version (exact version): 2.0.0.5344
Mono version (if Sonarr is not running on Windows): 5.20.1.34
OS: DSM 6.2.3-25426 Update 2
Description of issue:

I have sonarr, radarr, jackett and qbittorrent working in one stack in docker on Synology.
I created special non-admin user downloaduser UID=1025, GID=100 and give him RW rights to directories ./sonarr, ./radarr, ./qbittorrent and /volume2/Downloads.

But I have not expected behaviour.
In System TAB I see - No issues with your configuration (same for both sonarr and radarr).
In sonarr -> settings -> download client I have only qbittorrent.
In Qbittorrent settings I put Category tv-sonarr to mark all downloads from sonarr.
I put username and password, which I setup in my Synology account and test is succeded.

Then I added series Money Heist to be downloaded inside /downloads/movies/.
When download completed I go to download directory and found that I have 2 copies of Money Heist downloaded:

\Downloads\movies\Money Heist\Season 1\
\Downloads\tv-sonarr\La.Casa.de.Papel.S01.WEBRip.1080p.LostFilm\

If I go to check individual file location then I see something like that /downloads/movies/Money Heist/Season 1/La.Casa.de.Papel.S01E06.WEBRip.1080p.LF.RGzsRutracker.mkv
tv-sonarr directory created during download and not by me.

Why it happens and how to change that?

Here is my docker-compose file

version: '3.5'
services:

  sonarr:
    image: linuxserver/sonarr
    container_name: sonarr
    environment:
      - PUID=1025
      - PGID=100
    volumes:
      - ./sonarr:/config
      - /volume2/Downloads:/downloads
    ports:
      - 8989:8989
    restart: always
    networks:
      - linuxserver

  radarr:
    image: linuxserver/radarr
    container_name: radarr
    environment:
      - PUID=1025
      - PGID=100
    volumes:
      - ./radarr:/config
      - /volume2/Downloads:/downloads
    ports:
      - 7878:7878
    restart: always
    networks:
      - linuxserver

  qbittorrent:
    image: linuxserver/qbittorrent
    container_name: qbittorrent
    environment:
      - PUID=1025
      - PGID=100
      - WEBUI_PORT=8068
    volumes:
      - ./qbittorrent:/config
      - /volume2/Downloads:/downloads
    ports:
      - 6882:6881     # port 6881 in use by DS Download station
      - 6882:6881/udp # port 6881 in use by DS Download station
      - 8068:8068
    restart: always
    networks:
      - linuxserver

Sounds like: