I decided to pull a few plugs tonight and while they were out, I noticed that a couple of them had oil laying around the outside of the spark plug hex. After looking a little more, it almost looks like the spark plug hex is bottoming out on the j-head casting diameter and not allowing the plug to seat all the way. In this picture, you can see around the hex and down into where the threaded portion of the plug enters the head.
Is there a chance that my spark plugs are too short on the threaded side of the plug?
Is it normal to be able to see down around the hex on the plug?
I am just trying to figure out why there is oil puddling around the outside of the plug when I always torque them to 35ft/lbs. It just seams like the sealing rings on some of the plugs are not sealing.

Thanks