auto exposure prevents changes
When you turn auto exposure on, it is preventing from doing changes to exposure.
According to Tobias it shouldn't block the changes, and for him it works sporadically.
For me it always keeping reverting my changes once I change exposure until I switch off the checkbox.
If this is intended then this is inconsistent with what happens in whitebalance where you can override camera/spot whitebalance by just changing sliders. And also if it is intended checkbox should then disable the slider control.