I've been using the Key Grabber app to interface a Logitech 3 joystick with my mill. All had been working fine, until I somehow lost the config file. I rebuilt it, and reassigned keys etc. I use the small thumb wheel (not sure what it's really called) as the z-axis control, with x and y being the main axes of the joystick.

The problem is that whenever I send z up (or maybe also down-can't remember) a single pulse gets sent to the x axis and it jumps whatever distance a single arrow key push would have sent x. Why is this happening and how do I  stop it?

At first I thought that the key assigned to move x (buttons on the joystick just above the Z controller) was accidentally getting pushed, but I've been really careful to insure that's not the case.

Thanks.