my neighbor has a patch of grass in his lawn that seems to lay down on it self. i have a few patches in some other lawns i mow. after you cut the lawn, you rake it up and the grass seems to be twice as high and layered. i raked it up and then mowed, but it just went back to laying on top of itself the next week. im thinking of just replacing that area of grass, but has anyone else seen something like this and what do you recommend i do to fix it?