Vibrating Dial Pad

[mdphoenix]

So, the Vibrating Dial Pad is great. But, why does it play one of my notification sounds when in-call? Example. I dial the number and I get the vibration. When I enter the code for my voice mail, I get one of the reminder sounds played with each button press.

I searched for Vibrating Dial Pad but found nothing on the problem. Anyone else experiencing this?