I just got a new Gravely pro turn 152 and love it so far. I checked the blade tips with blade front to back of the deck to ensure that the pitch was correct and I noticed with the deck height set to 3 1/2 that it was only cutting at 3 inches. I tripple checked to make sure I had the pin in the right hole which I did. So I adjusted the deck to get it right at 3 1/2 inches with the pin in the 3 1/2 hole and 1/4 higher in the back. Now the deck lift won't latch. Any advice?