One of the weaknesses of the Searching/Filtering in the view schemes is that it does not update automatically if you add new values in the panes. To make it more clear lets have an example:
I have a database field "Topic" containing the following items:
Artworks, Architecture, Entertainment, Nature, People, Travel, Science Fiction, Sports.
Now I set up a View scheme that included only Architecture, Entertainment, Nature, Travel, Science Fiction, Sports, but not Artworks and People. So far so good.
But now I added through the panes a new value to the Topic field, such as "Holidays". This new value was not automatically added to the Search/Filter. Therefore I did not see the new value in the panes and you are asking yourself why?
Finally I found out that I had to add it manually to the Search/filter, than it worked. After some thinking I inverted the Search/Filter by selecting the "Exclude" option and excluding the values "Artwork" and "People". Then it worked very well. Every new value added through the panes was immediately displayed.
So it worked, but you need plenty of brain power. It is not obvious right away. I think user's mind is more adapted to include than exclude! A little bir more help would really be a big help!