My lid and the one I bought to replace it both have this problem. I haven't found a solution. I do have an idea about it though. My thought is to drill a small hole in the corner were the vertical part intersects the horizontal lower left side. After drilling the hole I thought a small roll pin that would protrude just enough to hold it in the proper position and not be too obtrusive. I might have to cut or grind the roll pin a little to make it work.