EKF variance issues with ArduCopter 3.2.1

I'm still seeing EKF variance in many of my flights. Latest attached.

Why is this?

The log also appears to be missing AHRS2 but has AHR2 - is this the same?

The DCM solution appears to track well. Not sure I want to make EKF the default!

In this flight I did autotune in the middle. At the end I ran a small auto mission. The copter missed the first waypoint by quite some distance before RTL as programmed. On RTL it lost too much height and I had to take manual control.

Apart from this the copter was flying well. Should I be worried?

Thanks

andy

80-01-06_17-03-38.bin

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