@citydwelleer-0 I agree that it's not something one would figure out before running into it, the site does nothing to explain and giving a message that says "bad ratio" makes matters worse, if anything.
Regarding to fully finished downloads, once you delete a file the torrent will automatically error out and stop seeding. In this case since the torrent is stopped, it is not consuming any slot, you're not seeding nor leeching it. If you try to restart the torrent it will re-download the missing files.
About moved files, there is no workaround for this. Either you move them back to their original place, or you will need to single-handedly set a new location for all affected torrents in your list.
The best practice is: move torrents using your torrent client, instead of moving files directly in windows explorer.
But you shouldn't pay much attention to moved files if you only move them after a long period, because they don't have high demand. After a few weeks/months you can remove those older torrents from your client, if you are going to delete some files, change names, folder structures, etc. If you are planning to keep everything, and simply move to a different drive, the best you can do is move them using the client UI. This way you can keep seeding those older torrents.
But honestly it's not worth the effort, usually once files go missing (moved or deleted) I simply remove the torrent from my list and move on.