Unrecognized IP in LAN firewall logs

[huron]

Hi,

My setup has one on-board Lan NIC and I have added one pci card for 2 more NIC's.
one port is set as WAN, other two are LAN interfaces with their own DHCP range.
LAN 1:192.168.1.1 DHCP RANGE: 192.168.1.100 - 192.168.1.200
LAN 2:192.168.99.1 DHCP RANGE : 192.168.99.100 - 192.168.99.200
two LAN segments cannot talk to each other as per firewall rules

I am seeing igmp multicast denies for 192.168.2.1(which doesn't exist as per my configuration) on LAN 1, this doesn't make sense to me.
I cannot ping or reach 192.168.2.1 from any machine or LAN 1 interface that appears to be denying the traffic.
Please let me know if you can think of something that could be causing this. see attached