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Normal from what I have seen with mine as well. Advanced auto pilot relies on waypoints projected out in front of the boat, in waves and rough water your boat is moving out of position more than you realize I believe.
The motor is compensating for the movement. You see the side to side action because the base of the motor is moving out of position in relation to the head of the motor so it turns to compensate for the smallest misalignment. Very accurate system from what I have seen with mine so far.
One other thing than can cause unnecessary corrections would be a weak gps signal. You can check that by the signal meter on the handheld display.
I absolutely love the ipilot and terrova. They hit a home run in my book so far with this system. I have been telling my friends this is the best thing to come out for a boat since the sonar.
Hey Minnkota how about a sponsorship 
This ocsilation back and forth is to rapid to be GPS relocating direction of the boat I belive, think hiting the left and right buttons every second or two.
Considering the boat itself is not moving that fast, in fact we were almost at a dead stop going into the wind when we had our problem.
It would be more like the unit was hunting for direction or bearing, than correcting for course drift.
I’ll have to check the GPS signal, you may be right on that.
Yes, they may have hit a home run with the I pilot, but I’m wonering if there’s a few problem area’s here.
So far I’m giving them a triple and not the round trip.
Not throwing away the older gimbal unit quite yet.
Al
