I have a P3S. When I select rth either by toggling the s2 switch, hitting the icon on the screen, or just turning off the RC, The bird doesn't come back to the point where it took off from. It just lands on the spot under where it happened to be flying at the time the command was issued. When I turn on the rc and the bird I see the message "home point saved" on the screen while the bird is warming up. Ideas or suggestions about why this is happening would be appreciated. Jim B.