If you look into this in a bit more detail you would realise that Yamaha have actually done the correct thing in setting the tempo's for the different styles....for example, your playing a nice slow ballad and want to go a bit more up-beat! so you pick a rock & roll style only to find its moving along at a snail's pace taking its tempo from the previous style...that my friend would be considered a design fault...adapt and enjoy your keyboard.

NJ