I have a HK bixler plane setup with APM2
I got the lates firmware uploaded and uploaded the bixler parameter file

Before every flight I let it calibrate and wait for gps lock

Tested in stablization it was good
Tested in RTL mode it was good
Tryed auto mode with 4 wps on the size of a football field,
Alt set at 60m
Plane made a couple of random turns then started to fly away
So I hade to recover in manual mode.

And also if I switch into auto mode on the ground the motor starts up

So question #1 why does my throttle turn on when it's not in motion and how do I fix it?

#2 how do I fix the nav. Issue?

Any help would be great THANKS