If I have downloaded multiple collections of files, eg "Mix 1", "Mix 2" and "Mix3", and then I've combined all the files into a single folder on my local PC (eg "Mix Collection"), can I still reseed one of those torrents in the future?

So I would download the torrent again, then point it to the entire "Mix Collection" folder, then confirm all the files of that original collection… Would most torrent apps ignore the unknown files, realise everything has been downloaded, and then start to seed?