Hi. Try running 'aex-helper info resource' to see what the values for the various resource keys are on that mac.
Also, see KB# HOWTO85011 to see how we create those values.
Settings that determine if we use the local computer values or DNS values are found in the NS console at Settings, All Settings, Agents/Plug-ins, Symantec Management Agent, Settings, Symantec Management Agent Settings - Targeted, then select the appropriate filter, Click on the 'UNIX/Linux/Mac' then check the 'Computer information' section.
Try adjusting those targeted settings. Reply if things still don't match up. If needed, please consider creating a support case.