At the moment SolarWinds NPM can only monitor/display OSPF neighbours from different RouterID on the same device. If one device is using the same RouterID for different instances of OSFP, SolarWinds will only monitor only the OSPF neighbours of one instance, basically there is a constraint on the RouterID.
It would be very beneficial to allow SolarWinds to monitor OSPF neighbours from all the instances that are shareing the RouterID.