You're not sharing the contents of your hard drive by any chance? When you set up LW it gives you the option of searching your hard drive for certain files.

One option could be to delete your personal limewire folder in documents and settings/user name (not the LW folder in program files). Then restart LW and set up all your preferences again, and pay attention to when LW asks if you want it to search your computer - choose "NO" - you may find you are suddenly only sharing the 80 or so you expect to find. I'd wait to do this though, to see if anyone else thinks this is a good idea.