KiCad through trace not isolated from ground plane

I am developing my first board. I make the backside of my board an entire ground plane. When I make a trace though and go through from front to back, none of the 开发者_开发技巧back traces are isolated from the ground plane when I look at it in the 3D view. Is there a setting I am missing, in all the tutorials they just press V, create a through pin and keep going.

You need to press 'B' to refill the zones after routing new traces