I'm trying to create a preset in ACR that will use the Auto tone adjustments on the Exposure slider ONLY.

In the Create Preset settings, I unticked all the options except for the "Exposure" check box and the "Apply Auto Tone Adjustments" box.

However, when I use this preset on images it changes ALL the sliders in the "Basic" section, and not just the Exposure ONLY. How come?? And is there a way to do the exposure only? If not, why not?