I use registrations that call up styles during gigging too. They are always mostly associated with an intro or a certain style part. When they are associated with a style, they are almost always associated with a transposition.

So if I have moved the transposition manually during the song and I'm on a different style part, I am kind of lost by hitting the registration button again. In the case that you are discussing, a jump button would be far superior, because it would bring you back to the previous style with the correct part and the correct transpostion.

Beakybird