Mouse/Trackpad Scroll Options Not Independent

I'm using 10.7 on a MacBook (late 2008 Unibody).

I am getting used to "natural" scrolling with the trackpad (slide up/page down) with Lion, and understand the reasoning behind it (to match iOS--I have an iPhone, so I'm already familiar the the slide up/page down scrolling). However, because of the behavior of scroll wheels on many computers I encounter frequently and habit, I want to keep my scroll wheel with the traditional setup (scroll wheel down/page down).

When I go into System Preferences->Mouse and uncheck the "Move content in the direction of finger movement when scrolling or navigating" box, the mouse returns to traditional scrolling (down/down). Unfortunately, my trackpad now starts behaving in the same manner (down/down), even though the "Scroll direction: natural" box in the remains checked under the Trackpad pane (it should operate up/down with that setting, but doesn't). If I quit System Preferences and then relaunch it, the "Scroll direction: natural" box is now unchecked, even though I did nothing to it. If I recheck it, and then immediately go to the Mouse pane, the "Move content in the direction of finger movement when scrolling or navigating" box remains unchecked. However, both trackpad and the mouse now use the "natural" (up/down) scrolling, when only the trackpad should. If I quit and relaunch System Preferences, the box in the Mouse pane is now checked, even though I did nothing to it.

It seems that the scroll preferences for the mouse and trackpad should and were meant to be separate and independent, since they each have the box under their individual panes, but they are not operating separately. Are there any ways to fix this so I don't have to change the preferences every time I switch from the trackpad to the mouse?