Homepoint way off

I’m flying a Phantom 4 Pro.  The last mission I chose a double grid and it drew the flight plan exactly where I was.  However upon take off, the drone tried to fly miles away.  On my ipad, it thought my position was also miles away.  I could never get it to fly the mission because of this.  

What should I do if it happens in the future?  I had “ignore homepoint” checked.  Is there a way to reset your homepoint? 

For optimal experience with Pix4Dcapture, we recommend to proceed with basic checks (especially regarding the latest versions):

The home point is normally reset automatically when you start a new mission with Pix4Dcapture. The home point is where the drone’s GPS gets the satellite signal, i.e. where it is turned on.

When the Ignore home point option is activated, it means the drone can fly a planned mission whose center is further than 150 m away from the home point.