Scene objects don't seem to store the proper ObjectType

When I assign a simple T2DSceneObject an object type in TGBX and then try to access that object's ObjectType property, I always get a type named "unknown", despite the fact that I know it has a type assigned to it.

I can fetch the type using

TorqueObjectType buildingType = TorqueObjectDatabase.Instance.GetObjectType("Building");

...but this won't match the type assigned to the scene object in TGBX. I simply want to check a scene object's type to see if it's a building or not. I would expect that this would involve the ObjectType property but that's not working. How do I do this?

Thanks,
Mike