That's odd! Did this happen after right after an app or software update? What type of phone are you using? If you've used the Join Me number within the past couple of days, is it still behaving as you mentioned in your original post?
It's me again! I just wanted to stop by to see if you've had a chance to look over my recent reply to you. We'd love to figure out what's going on with your dial pad but I need a little more info.