I'm thinking that you are coming over the fence with a bit too much energy and leveling off too high. Every situation is different, but in normal conditions I would want to be 5-10 knots slower over the fence, say 70 knots. I am full flaps, generally with only idle power, but I will add a touch if density altitude is a factor. I fly the plane down to where I feel the wheels are about 6 inches over the runway. How do I know? I don't know...I basically use the force. Then I wait. Being impatient, or trying to force the plane onto the runway, has been the cause of many a Mooney accident. I wait for the plane to decide that it's ready to land and as it tries to settle on the runway, I hold the nose where it was on the horizon, until the mains have contacted the runway. People make the mistake of arriving in ground effect with too much energy and try to land the plane instead of setting the conditions for the plane to land itself. Hope that helps.