about the downloads with different names thing...

Sort a search some time by file size: see ANY that are the same size? no? That's because XoloX uses ALL files are returned from a search which have the same size as the same file.

Do a search for a movie, say "matrix" then start the download from the highest score; open your resumeinfo.txt file and look at the remote file names of the cached hosts. see?

As for the first request... I'd have to do some tests... can't say as I've ever tried to download a file I was already sharing...