Different Black Levels?

[ClaytonMG]

I tried to search for a thread like this but all I could find were people with problems with their equipment. But I have to ask... I've been using the avia test disc to set up my TV, and I check the test patterns on the Sony discs and they give me the exact same results. Now here's what I've noticed, on certain movies, the picture is way brighter than others. I got Wild Hogs on Tuesday along with The Lookout. Wild Hogs had the perfect brightness setting, everything looked fine. But when I popped in The Lookout (same studio, same AVC encode process) the picture was too bright. I'm not talking about the way it was filmed even. I know that The Lookout was filmed using the Panavision Gennisis which causes little pixels and whatnot and can alter the brightness and contrast. But the actual black bars on the picture are also much brighter. I've noticed each movie seems to be different. Like Disturbia, the picture loses detail in the dark scenes and stuff seems to be more of an off gray than black, but you don't see anything in the picture. Then there's Silent Hill, yeah the black bars are actually dark black, but the picture itself is bright enough to see what's going on. This seems like a rant now, but has anyone else experienced this?