Got the rover working really well.....I thought. Now it has decided to start throwing drive belts... The big belt that goes from the pulley under the inspection hole below the steering wheel to the two great big alloy discs under the seat to the other pulley under the mower. First thing I've noticed is the belt will not stay oriented the correct way that is thin edge of the wedge in and widest part of the belt out. Even if you are meticulous in installing the belt correctly...as soon as the mower is started the belt flips around the opposite way then eventually jumps off. The belt tensioner appears to be working fine and the belt is pretty snug....any thoughts or previous experiences similar?