Weird Index behaviour

OK - this is weird - or I'm just not looking at it right..

Have my Music Library set up - Folder in the library is not the default folder its another one that i've manually added..

If I search for a specific group - say Kraftwerk - I get all the music with said group. At this point I'm prompted to add the location to the Index to speed the search.. OK so lets do that..

Now repeat the search - no results.. Hmm OK - maybe the Index building process is a little slow - go away for 12hrs (assuming I can leave Windows 7 alone for that long) - come back repeat the search - nothing again.. Grr..

OK remove the folder from the Index - repeat the Search - now get all the music for Kraftwerk..

Bloody annoying...

thoughts ???

Gazzar