I cannot for the life of me get my deck leveled out. the right blade (standing on mower) is perfect, 1/4'' pitch, level side to side. the left blade is roughly 3/16'' higher, only 1/16'' pitch front to back, level from side to side. spin the blade 180 degrees same thing. these measurements are with brand new blades, had issues with the ones i took off though too. am i looking at a bent deck or is there something i can check? tire pressure is actually 2psi higher on right side, so evening them out may even make it worse. both bolts on front deck brackets are in middle holes. 2 spacers on top of each blade, and casters are installed properly. Visually i can't see any bend in the deck. its only got 100hrs on it, 1yr warranty left. is something like this covered under warranty?