Well, there's nothing you can do really as this is the issue with the seedbox you are using (and many seedboxes). Let me explain while trying to avoid being too technical.
A seedbox is actually a large file server that supports many users and runs a torrent client (in the case of Debrid, its Transmission) for each one. The SysAdmins of those servers, know that a lot of users will often download the same file and most likely from the same source/site. As an example, let's say that there is a new Windows from Team OS that is 10 GB in size and 100 users of the Debrid want that torrent. The Seedbox has to download 100 copies X 10GB = 1 Terabyte in total size and traffic. As you can see it's not very practical and a waste of bandwidth and space since it's the exact same file, downloaded and stored 100 times.
So what servers do is make use of a technique called Data Deduplication in one of its forms. When a server uses such a process it makes sure that when 2 or more users download/store the same file, the storage keeps actually one copy stored and uses a link to the said file for each other user that needs it. In the above example, the server will only store the file for the first user that will ask it, and download a total of 10 GB and not 1 Terabyte, saving 99% in bandwidth, time, and space. The more users that download the same file, the higher is the cost-saving for the server.
The negative part is... only the first person that asked to download the torrent, will actually be a seeder. The rest can still download the file to their seedbox and PC but can not become seeders as they are actually using the 1st downloader files. That's why even tho you have some torrents that appear as seeding on seedbox, they won't show up on the tracker list in our site, cause the tracker sees them as used by another member that made a request before you and doesn't give you or anyone else credit.
Sadly there is no way around it unless you download that torrent from the seedbox, and seed it for yourself from your own PC (or maybe another seedbox?) or Debrid changes the way they seed.
Hope it helped.