And I hope some newbies now have an inkling on what to do next. Scanning any system, any port twice is sloppy. Be organized, and minimize the packets you send out. Patterns can be mined and deduced. Sending packets at a fixed interval is stupid.
Patience is a virtue.
It's hard to even say that one packet could be misrouted, let alone several. I don't want to quote Mentor's Manifesto, but remember, it's all about seeking info, and learning. Use this info wisely. No, it won't help you change your grade in your school's computer. No, it won't help you crash your buddies'Win9x box.