Confirmed here also, with x64 Windows 7.
What it is doing specifically, is listing these keys twice:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\ProfileList\name (name = S-1-5-18, for example)
and not listing these keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\name