An Un-Seeded Meet is one in which you DO NOT want the computer to seed the event. You will manually enter athletes and relays into lanes and positions. EX: This kind of meet might be a High School or College Dual Meet in which the coach does not disclose his/her lineup until an event actually begins. Within the Seeding Menu, you can click on the column labeled Manual so that you will not be able to mistakably seed that event.
Click Here for a description of the four ways to Manually Seed an Event.