Nice effect ! I tried to reproduce it using your PointZ Z2 dock with no luck ...
but it seems to me that the new image has a diffent size respect PointZ (151x411 pixs) and \or did you changed some values amount in the .ini file ?
are the "top" values equal to the "bottom" values (OutsideBorderTop= \ TopHeight= ) ? \ what happen if you flip the image ? ...