I thought so, but it seems like an error. I guess it would be easy to change by Scirra, but if changed it will properly break games that depends on this rather strange and wrong (IMO) behavior.
I wonder how to fix the issue in the attached capx project? Beginning to mangle with coordinates to ensure correct scale seems not that trivial.
Maybe the viewport expressions (viewportleft, viewportright, viewporttop, viewportbottom) could let you do this (you will be able to set the position of the origin relative to those).