Yes, please post a picture of what you have seen.
Show us a photo of what you mean.
Al
thats what I think as well, but it kind of fly in the face of "if you are looking you aint cookin" opening the cook chamber door everytime you need to add more wood seems kind of counter productive.I can't say with certainty but the only thing I can think is they are pre-heating. With very large cookers the top of the firebox might be to hot.
Just a thought though.