Q. There are two separate network ovals on my map where I only expect one.
A. Examine the network oval's status window to determine whether the subnet masks are the same in both ovals. If the subnet masks are different, one of the devices connected to the oval with the "wrong" subnet mask may have a misconfigured subnet mask.
Note: For devices polled with ICMP echoes, InterMapper tries to guess whether it should draw a link to the network that contains the IP address. If both network ovals look equally good, it may draw a link to the "wrong" one, or alternate between them.