It is the way the machine is programmed to cut. Have similar issue with a Triax pro, on the snake cut the machine returns to position 1 after every cut.
So rather than a smooth straight line when you have 2 x 3 cuts side by side on the original the machine will cut a 3 go to a 1 then down to a 3 cut and so on.
If they keys work don't worry about it.