I upload for you model to show "issue"
After opening it in Lightwave I see multiple layers (this model is light but you can imagine something bigger...)
surfaces are correct (guys from Rhino use one layer with multiple surfaces names - thats why I get correct surfaces in LW, otherwise , in traditional way I get one surface name)
Topology in Rhino with layers/names is different than in Lightwave. This is not issue and we can deal wit it. Issue is multilayer construction after export from Moi.
In attachment object R5 for test and screenshot from LW.