These few files that you're seeing are probably junk. See:

http://www.gnutellaforums.com/showth...threadid=41432

Also, check out the sticky (in red) in this section - Major Topics for download/upload help. Follow the links about songs being corrupt. You can try using the 'All Type' search rather than audio, sometimes that'll give you different results. Searching at different times of day & varying the description of your search might help, too