odd DUP! issue with ping

Hi,
am hoping someone can help me out here.
I have a mostly static IP laydown on a home network.
Quite a few devices.
some wired, some wireless.
I can go into great detail if someone would like, but a quick question:

On my wireless laptop, with static IP, when I ping my broadband router (thus it must hop through the wireless access point), i get DUP! replies.
if that's not odd enough, the other "reply" address is not even in my network!

see below:
oakz-MacBook-Pro:~ oakz$ ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1): 56 data bytes
64 bytes from 192.168.2.1: icmp_seq=0 ttl=64 time=2.253 ms
64 bytes from 192.168.1.92: icmp_seq=0 ttl=255 time=6.462 ms (DUP!)
64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=2.449 ms
64 bytes from 192.168.1.92: icmp_seq=1 ttl=255 time=6.783 ms (DUP!)
64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=2.204 ms
64 bytes from 192.168.1.92: icmp_seq=2 ttl=255 time=6.491 ms (DUP!)
64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=2.172 ms
64 bytes from 192.168.1.92: icmp_seq=3 ttl=255 time=6.591 ms (DUP!)

my router is 192.168.2.1(static)
my laptop is 192.168.2.203(static)
my access point is 192.168.2.200(static)

why do i get dupes and what the heck is this 192.168.1.92 device!?