Lightroom for iPad and preset stacking

I have lightroom for iPad and I installed some presets. The presets are in separate modules I.e one for exposure, one for sharpening, one for creative effects etc. However, when applying the presets I can't  use more than one per image, for example if I use the preset for exposure and make the photo brighter when I try and add the preset for sharpening it reverts the full image to original and then applies the sharpening preset. Is it not possible to stack presets in light room for iPad? 

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