Based on on the last 2 pics, I think everything is as it should be. This deck is a ground contact deck and only the 2 front swivel casters and the rear middle wheels should contact the ground when lowered. The cutting height is adjusted by setting the front casters and rear middle wheels per the sticker on the deck. The front middle wheel and the one on the left rear are there as anti-scalp, and the rear one is rotated 90 degrees to help in sliding the deck out. When my deck is lowered there are only 3 contact points, the 2 front and one rear middle wheel.