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From: VanguardLH 
Newsgroups: microsoft.public.windowsxp.help_and_support
Subject: Re: Explorer filename sorting - disable ignoring of the hyphen ("-")
char ?
Date: Sun, 27 Mar 2016 17:15:46 -0500
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microsoft.public.windowsxp.help_and_support:31828

A shorter answer:

If you want to include some signed numbers (interpreted by parsing text
strings) then ALL numerical substrings must be signed.  You are adding
"-" to represent negative numerical values.  So use "+" for all the
positive numerical strings.
--- Platinum Xpress/Win/WINServer v3.1