Recently I ran a second chime for my doorbell from the first floor to the basement. For a while I would get a ding-dong ring on the first floor and a buzz-dong ring from the basement. At first I decide not to worry about it. Now whenever someone pushes the button the chimes might run, buzz-dong ring or no ring at all. This happens either when the button is press quickly or slowly.
What could this problem be? And how can I solve it?