Mine does have the two clamp latches. Kevin found they hold the door closed tighter as SmokinGuitarPlayer pointed out. I was having some leakage on the door but once I added some gasket that Kevin had given me to the door (originally just had it on the body of the smoker) it sealed it up completely and now runs airtight.
I did a short chicken cook yesterday with no water in the pan and it did run hot but I was just using it for a couple hours. I think using the water pan and using less charcoal as previously mentioned helps. I haven't played with a maze yet but plan to soon.
Alpha Smoke Competition BBQ Team