I have noticed when applying default presets in Lightroom, the histogram does not display accurate data. Even when the image clearly has clipping highlights/shadows it doesn't show on the histogram which i think could be a useful feature.
Are you clicking and choosing the preset? Or just running your mouse across it? Lightroom displays the updated histogram info if I click on my system. If I run my mouse across the preset, the image changes but since the adjustment isn't applied the histogram doesn't update.