When painting with a self created brush preset it always changes the title of the brush from whatever you have called it to Custom after you have made the first stroke, even though no sliders have been moved to change or alter the brush.This in its self doesn't alter the ability of the brush to do what it is being asked but can leave you wondering if you have been painting with the brush you first selected or whether it has changed.This doesn't seem to happen with the presets that come with LR. A friend has confirmed that his self created presets are doing the same.