Apple has me so well trained on natural scrolling that when LaunchBar scrolls the old way through its lists, I panic a little. "Why is it going the wrong direction?" The LaunchBar gang has a post explaining their design decision. They also have a terminal commands for people like me that want a naturally scrolling LaunchBar. If you want natural scrolling in your LaunchBar, go into your terminal and type the below command. Then quit and relaunch LaunchBar and you'll be all fixed up.
defaults write at.obdev.LaunchBar NaturalScrolling YES