I thought of that, too. Then I realized that I could achieve the same by simply switching the start and end values of the x coordinates in the inverted positions.
sby, there seems to be a bug with the latest animtools version (19.1 I think). Sometimes on loading a new position (at least through dialogues, I didn't thought of trying it separately) the girl went completely messed up, or the body dissapeared or the position loaded displaced. When returning to 19 version, those things stopped happening.