Duplicate echo reply received

[Heimire]

We are seeing this on both firewalls. 
They are located in a data center so the gateway is just a hop a way on a gig connection.

We have 2 different circuits using BGP and CARP.

Time Process PID Message
Dec 23 08:09:33 dpinger WANGW 64.9.133.17: duplicate echo reply received
Dec 23 07:57:35 dpinger WAN2GW 64.9.133.25: duplicate echo reply received
Dec 23 07:03:20 dpinger WANGW 64.9.133.17: duplicate echo reply received
Dec 23 06:36:04 dpinger WANGW 64.9.133.17: duplicate echo reply received
Dec 23 06:35:40 dpinger WANGW 64.9.133.17: duplicate echo reply received
Dec 23 05:37:53 dpinger WAN2GW 64.9.133.25: duplicate echo reply received
Dec 23 03:30:37 dpinger WAN2GW 64.9.133.25: duplicate echo reply received
Dec 23 03:14:43 dpinger WAN2GW 64.9.133.25: duplicate echo reply received
Dec 23 02:07:58 dpinger WANGW 64.9.133.17: duplicate echo reply received
Dec 23 00:39:56 dpinger WAN2GW 64.9.133.25: duplicate echo reply received
Dec 22 22:40:07 dpinger WANGW 64.9.133.17: duplicate echo reply received
Dec 22 22:27:43 dpinger WAN2GW 64.9.133.25: duplicate echo reply received