Loiter Turns does not function as described in ArduPilot copter guide.
Turn - the number of full rotations to complete around the point.
Dir 1=CW - the direction to turn around the point. -1 = counter clockwise, +1 = clockwise.
Lat, Lon - the latitude and longitude targets. If left as zero it will circle around the current location.
Alt - the target altitude above home in meters. If left as zero it will circle at the current altitude.
Dir has been removed.
So how do you make the craft go CCW?
-1 turn only stops the mission.
IE: LOITER_TURNS: Turns -1 and Radius 100 will make the craft go out 100m, pause and carry on with the next command.
I did a bit of digging in the parameters list and it looks like if you set circ_rate (can’t remember exact parameter off the top of my head) to a negative degree value it will go ccw. I haven’t tested yet but it says this in the parameters description.