Here is the simple answer: it was that way when we got it! Actually if you think about it, this would provide the best stability as the wheels on the engine side are out farther, making it less likely to tip. It has been used as a haying tractor, mowing and raking in steep ditches so safety has been a concern. I guarantee you it won't tip over the way it is, I have slid sideways down quite a few ditches.
No weights on that side that I know of.