I am saying exactly that - but obviously not if the movies are all in one torrent. You can, theoretically, have infinite different download locations (actually 'infinite' might be OTT) all going at the same time.
I don't know how exactly your torrent client is set up but when I open a torrent file in uTorrent it asks me where I want to download to. I just change the location to, say, my Falcon folder or my Catalina folder.It can be any location on my computer, any hard drive, partition, folder, sub-folder.
uTorrent offers a handy drop-down list of the most recently used folders or a Find button to look for the folder you want to save to.
If you download to one folder and then decide to move the file, uTorrent lists it as missing. You then just go to Advanced and change the location by pointing uTorrent to the new location and it will happily carry on seeding.
Forgot your second point. If you download to a specific folder, there is no need to move it (unless you change your filing system) so the file is just sitting there if you need to help with a seed.