Okay, so I have a brand new S180. I am following the instructions in the manual which says to set the front of the deck 1/8-1/4 inch lower than the rear of the deck. When I get done with that, I happen to look at the blades and I see that the forward part of the middle blade cutting edge (when aligned front to back) is maybe 1/4 inch below the front lip of the deck and 180 degrees away the blade edge is almost 3/4 in higher than the forward part of the blade. Is this normal? I know you want to avoid double cutting the grass, but this seems excessive. It appears as though the rotational plane of the blades is not parallel to the plane of the deck lip but is angled down to the front of the machine. Any thoughts on how I should proceed?