@goldorak-0 any torrent that you haven't fully downloaded (selected 100% of the files) will count as "downloading" as long as they are active in your torrent client.
If you don't know which torrents you are seeding that were not fully downloaded, you might need to pause ALL your torrents in order to free up the download slots you need.
Tip: Go through all of your torrents and pause everything that you have not downloaded fully.
You can either pause them indefinitely, or you can mark them with tags to let you know which torrents you need to stop when you run out of slots.