If reset the shield to X0Y0Z0, and then issue “G0X5”, all three axis green lights light up, even though only the X axis actually moves. That seems wrong to me.
If I issue “G0Y5” or “G0Z5”, both the Y and Z axis LEDs light up. Again, that seems wrong.
I’ve tried 0.8a and it seems fine. As far as the lights lighting, this is not unusual. As long as the axes you are diving r moving correctly (and the others are not doing anything they should npt be) this is OK.