So, the shift lever has a "Reverse-Neutral-1-2-3-4-5" speed selector, is that right?
When you move it to "Reverse" the mower moves forward, but when in "1-2-3-4-5" it goes in reverse, am I understanding that right?
When did it start working like that? Tell me a bit more about the history, are you a new owner, original owner, what work might have been done to the unit, etc.