... Yes, it will do that. The wrapper datasets has exactly the graphs described but does not allow new graphs to be implicitly created just by naming them.
If you want the full dataset including adding new graphs you'll need to describe a TDB dataset - you have anon-TDB dataset with a single TDB graph. TDB can
... What is the exact command arguments you are using? I tried to recreate a call to the command line tdbloader with a --graph argument to get a NPE but