Hi Amir,
Thanks for the question. Actually, you've found a small bug that still remains from one of the early versions of RailClone. The X and the Y rotation are indeed swapped, but if we fix it, it could break hundreds of presets and user styles because it's such a commonly used parameter. Therefore we decided to keep it as it is - in fact I think you might be the first person to spot it!
Cheers,
Paul