I think I know what the issue is ... these are people who already completed downlding from you or stopped for whatever reason but this was actually some time before you opened the monitor window. I've also seen that before. LW must be a little slow to register itself when the monitor window is opened. I don't think it's an issue.
More of an issue though is if you are firewalled & people are having to use a 'push' request to access your files. Make sure your firewalls are configured to allow LW full access:
http://www.limewire.com/english/content/firewalls.shtml
One way to check is this: Do this test:
Bug Report instructions & sample image If True then that's good but if False then you're firewalled & not properly configured.