yes, no problem at all. as long as you’re careful about partitioning when you’re installing the second distro (it should be able to do that automatically, if not, you’ll need to identify the EFI partition manually) it won’t be a problem. you can afterwards just remove the distro you no longer want. after that, you just gotta update grub so it can remove the no longer existant from it’s os table and you’re good to go again.
i’m not quite sure whether i understood your question but this seems to be right. the
5
fromS01E05.*5*.mkv
is higher in the alphabet thenm
fromS01E05.*m*kv
so it belongs above that entry.