I just purchased a 60"Lazer Z. Last year I used a toro 44 w/b. What I'm running into is uneven grass where I turn corners. I guess the outside edge of the deck sinks down as I turn and the inside edge lifts up. I had 2 complaints so far and I pretty bummed since I wasn't expecting any cut issues (never had any with the toro). Anyway, is this normal?