My Phantom2 seems to have decided on it's own distance limits. It will travel appox 100 meters. Once It reach this limit, it ascends (20m?), spins around to point home and and then heads there. I can flip the GPS/ATTI switch to get back into control once the process has started. It's doing it in both ATT and GPS mode. I have changed (increased) the limits in the Assistant software but they seem to have no effect. Any suggestions?