What I could do is make a quick program that will list all the folders that API returns. This way we can make sure if it is showing the correct path or not 
Shane
Sorry, I have been out of touch for the past few days.  If you want to provide a test program, I would be happy to try it and report back.
I did notice in the Vss log that the listing of directories on C:\ reports the D:\Users Junction:
C:\>dir B: 
 Volume in drive B is SSD
 Volume Serial Number is 7214-5953
 Directory of B:\
--------------------------------------------------------------------------------
[6/7/2013 - 9:51:14 AM]
--------------------------------------------------------------------------------
05/01/2013  11:27 PM    <DIR>          AMD
04/22/2013  04:18 PM    <DIR>          Program Files
06/07/2013  04:34 AM    <DIR>          Program Files (x86)
02/26/2012  01:46 AM    <JUNCTION>     Users [D:\Users]
06/05/2013  03:56 PM    <DIR>          Windows
               0 File(s)              0 bytes
               5 Dir(s)  55,767,150,592 bytes free