MediaBay... sigh... simple things that should work

When using MediaBay, I can’t figure out how to SCROLL the results view. I have one file selected. Whenever I scroll up/down the view SNAPS back to the selected track. This makes MediaBay useless. How can I scroll to other pages of the 50,000 files in my SFX library if MediaBay snaps back to my previous selection?

I’ve also tried the KeyCommand ‘Shift+Enter’ to play selected files but this doesn’t work either.