Hello,
I wouldn't worry about this, as the CurrentVersion folder is not a real folder, it is just a junction to the (in your case) 12.1.4013.4013.105 folder.
It's a lot easier to see in Win7 and 2k8, as the CurrentVersion folder has a little shortcut icon on it. However, in WinXp and 2k3, windows junctions are not reported as shortcuts so it's more difficult to tell.
If you want proof, then download the Junction utitlity from Microsoft and run the command:
junction -s "C:\Documents and Settings\All Users\Application Data\Symantec\Symantec Endpoint Protection"
This should give you results similar to mine below:
Junction v1.06 - Windows junction creator and reparse point viewer
Copyright (C) 2000-2010 Mark Russinovich
\\?\C:\Documents and Settings\All Users\Application Data\Symantec\Symantec Endpo
int Protection\CurrentVersion: JUNCTION
Substitute Name: C:\Documents and Settings\All Users\Application Data\Symante
c\Symantec Endpoint Protection\12.1.4013.4013.105
The Junction utility can be found on the below link: