connections issue

I recently downloaded Limewire onto my system, and everything is fine with the exception of one concern. Under the connections tab, I noticed that there are many other users receiving/sharing/dl'ing files from me. I attempted cancelling Ultrapeer users, and even disabled sharing under Tools, Options. I am not sure the extent to which I should be worried about this, which is why I am posting this message. Is this something major, or something that really shouldn't cause problems? If someone can get back to me on this, it would be appreciated. Thanks.