Looks like you have email support with us. In the future, feel free to email us directly or submit a ticket here and we'll be able to help more quickly: https://support.urbanairship.com/hc/en-us/requests/new
As to your issue, does it not increment let's say from 1 to 2, once there is already 1 on the badge and just stays at 1 with additional messages? If you reset it to zero, does it increment to 1 still?
Also, what changes have you made to the app between the time it was working correctly and now?
Urban Airship Technical Support