Windows doesn't use ASCII. It uses Unicode (actually UTF-16). But that's actually irrelevant. The sort (actually collation) order is set according to your locale/language settings. All the previous setting (the one we've been talking about) does is turn off the "break filenames into tokens and sort so that numbers are sorted as numbers" mode. The ordering of the individual characters is still not actually ASCII.

Why do you want these files in ASCII order, anyway?