Hi,
The path axis for conveyors is set to automatic by default. The pusher transforms the parts to another conveyor, which is at a 90-degree angle compared to the original conveyor. This changes the path axis from X to Y, but the automatic mode does not realize it. Thus the second conveyor thinks that the parts are rotated 90 degrees.
To force the second conveyor to use Y-Axis, you must go to the modeling tab, select the conveyor path, and set the PathAxis to be Y-Positive.