Bend affects all Voices

Hello,
Whenever I use a bend (such as seen below), the bend affects all the Voices/channels with that note, not just the voice that the bend uses. Please add a way to let us switch between a bend affecting all the voices, and the bend affecting only the voice it's on.

Additionally, could you please expand the range of a bend? The current range (three whole steps) is quite limiting in some situations.