If your tracks on the map page are disappearing or are staying very short, you may need to adjust your track time length, the following steps tells how....
  1.  Start on main menu
  2. Select "Setup"
  1. Select "Dogs"
  1. Select "Dog Track Length on Map"
  1. You can now select from Hide all tracks, 5 min, 10 min, 30 min, 1 hour, 2 hour, or off.
Note: "Hide" will hide all tracks all the time. "OFF" will show the track in its entirety until the hunt is over.