It could be to do with the names of your files.

When downloading a file you look to see how many people are sharing it and usually select the one with the most users, that way you connect to more hosts and have faster download speeds.

If you have files named 'well' and 100% correctly ie. artist-title you may be the only one sharing that file, as if you notice on limewire a lot of files will be named t648492_artist_title etc.

Limewire for very good reasons does not associate files together which are the same size and have similar names.

I noticed this when downloading movies, most of what I downloaded had stupid letters or numbers in the file name. when I renamed it no-one downloaded the file. If i kept it exactly the same they did!

crawler_nt's point about naming is interesting. Also, do your audio files have id3 tags? Having both file names & id3 tags will help them to be found. The more id3 tag info the better. I always try to tag using "both" ID3v2.x & ID3v1.1
Tags will help files show up in search results because with more info, there's a greater chance a part of that info will tie in with someone's search.

BTW your bug report looks healthy to me.