That doesnt work I still get only a single file.
@Grant243576717eby Is your video actually cut up into different selects or are they all through edits? If they are just through edits then you would still get a single file. Even if you are rendering with handles that overlap the other clips it would still end up counting as a through edit.
This is a through edit: when you've made a cut but it's still the exact same thing and you could just delete the cut to join them back together. Rendering and replacing these two separate clips would give you one clip.

If this is the case I'm not entirely sure that this is the best method to approach breaking the clip up. You might want to use something like Lossless Cut so that you can break the clip up without re-encoding.