Motion path moves in reverse?

I created a graphic where an object moves along an arc animation path (up) and I reversed the direction of the path (so that the object moves from right to left). It plays perfectly in Powerpoint (2010), but when I publish, the object moves from left to right, as if I had not reversed the direction. 

I thought that Articulate supported the reverse motion path. Am I wrong about that??? Am I doing something else wrong?

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