I have 2 ethernet ports on my computer network. One has only addresses 192.168.0.x.

I have found that the other port also has some of those same addresses. The software is getting lost, as it sometimes gets responses from the wrong network.

Any ideas on how to fix this?

Dave

start off by giving a better description...

as a totally blind guess, if you are running dhcp, i'd say one machine had the dup address, was off for a while, and dhcp assigned the address elsewhere.

turn off both pc's.
go into dhcp, delete the lease.
restart both pc's.

voila'!