Comment 3 for bug 1639488

To check this, I pause the clock, select any object, center the object. Using the selected objects coordinates, I input those coordinates into these script commands:
     core.moveToAltAzi("Alt","Az"), or
     core.moveToRaDec("RA","Dec")

The correct response should be no motion at all since the selected object is centered, but in fact the object moves off center (downward for offsets < 0°)

I typically use the offset set to -32° as I much prefer a sky-dominated view compared to a roughly 50/50 sky/landscape view.