New Kubota ZD 28 Pro, with the pro deck. I am having big problems with the mower leaving about a 1in strip of grass between the blades. It is as if the blades are too short and do not overlap or come close enough together. It is the worst when cutting thick grass like Emerald Zoysia, no matter how slow I go, if I go at the creep speed the mower still leaves the strip. In Bahia grass if the grass is tall the mower still leave the strip if the Bahia is shorter it does an OK job most of the time. Mower has plenty of power, just a very poor cut. Is this a known problem with this mower or did I get a lemon??????