I have canned in my canner once. Never noticed tte lid problem and everything went very well that time. The next time I noticed when I put the lid on I couldnt get it level if my life depended on it. I was so discouraged Thought I was going to have to contact the dealer. .Thought I had done something to warp the canner! I was a mess......My husband looked on line and found this post, and noticed the three lid idea that you gave. I just wanted to say Thank You!!! That was a great tip and helped me so much!! Kuddos!!! Rozanna