Sounds like you might be seeing fake files

If you're searching for music files, use the All Types search & search for artist or album rather than song title. Go for a file with 10 sources or less...stay away from the files with huge numbers of sources.
If you're searching for video files, always chech the file with Bitzi before download. If a movie has heaps of sources but no Bitzi rating, chances are it's a fake.

Check out the threads below for more info & tips, including how to use Bitzi.
Fake files showing up in search results
How to find music


You could try deleting LW's preferences folder when LW's properly closed. This has worked for people when absolutely everything needs more sources...it won't hurt to give it a try.
See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will kill all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.