Dash Button packetInterval and interface

My amazondashbutton.things:

amazondashbutton:dashbutton:Apartment_Doorbell [pcapNetworkInterfaceName="private", macAddress="b47c9cbcb94f", packetInterval=15000] {
  Channels:
    Type button : press
}

I would think 15 seconds for packetInterval would be enough, but I am getting double doorbell activation when pressing the button once.

events.log:2017-06-28 11:38:24.647 [ItemStateChangedEvent     ] - Family_Entrance_Doorbell changed from CLOSED to OPEN
events.log:2017-06-28 11:38:24.818 [ItemStateChangedEvent     ] - Family_Entrance_Doorbell changed from OPEN to CLOSED
events.log:2017-06-28 11:38:27.617 [ItemStateChangedEvent     ] - Family_Entrance_Doorbell changed from CLOSED to OPEN
events.log:2017-06-28 11:38:28.131 [ItemStateChangedEvent     ] - Family_Entrance_Doorbell changed from OPEN to CLOSED
events.log:2017-06-28 11:39:49.694 [ChannelTriggeredEvent     ] - amazondashbutton:dashbutton:Apartment_Doorbell:press triggered 
events.log:2017-06-28 11:39:49.695 [ChannelTriggeredEvent     ] - amazondashbutton:dashbutton:Apartment_Doorbell:press triggered 

My second question is, how to I configure textually the binding to only listen on a specific interface?