trusted files - multiple versions of same and some windows/temp

One odd thing I noticed when going over trusted files in my 5.1 is that I see many of the same file in the list. Now I know it trusts files by hash but why not remove the old prior one if filename and path are same. As highlander - there can be only one.

Also I see these (list below) in the trusted files list and I can only assume they were from switching to install mode or allowing installer trust, but I don’t want these hanging around as they seem to be temp files and really should not need to be trusted anymore. Can I safely remove these?

Safe to remove from trusted list:
c:\Windows\WinSxS\InstallTemp
c:\Windows\Temp
c:\windows\installer
c:\windows\installer$PatchCache\Managed\

The first problem has been fixed in CIS 6.

You can delete those temp files by using “Purge”.