That doesn't look right to me. When you slide open the vent door you should see the inner plate of the guru adapter. I believe I can see your firebox in there. If so, you have a large amount of airflow that you shouldn't have. The guru adapter should completely seal that vent.
Weber 22.5" Performer
Weber 22.5" One Touch Gold Kettle
Weber 18.5" One Touch Silver "Guinness" Kettle
Weber Genesis gasser
Blazin' Buttz BBQ Team