Transparent PNGs Issues

Importing transparent PNGs have a couple of issues - in particular with NORMAL and MULTIPLY blend modes.

First issue is if you scale the image smaller the surrounds are filled in black - when it ideally should be transparent.

Also, once the transparent PNG is added to the "meld" with either NORMAL or MULTIPLY blending the layer background is black when it should remain transparent. Which is different to how it is displayed in the crop screen.