jog diameter lathe

I have a small problem, I am in diameter mode G7 on my lathe but when I jog 1mm (X axis) the turret moves 1mm on the radius or 2 mm on the diameter.
Is there something I'm forgetting to do?

I've done some tests with machining programs in diameter mode and it takes it well. but I'm still jogging in radius, is that normal?

I'm not positive but I don't think G7/G8 extends to jogging, so that would be the normal behavior I guess.