I didn't realise they rendered the interior brickwork as well. A lot of these construction techniques are unfamiliar to me in comparison to the brick veneer style used in Victoria.
I'm not quite sure why there are so many marks that have been patched up. It almost looks as if someone has been through with a stick and randomly started scratching up all over the place. Perhaps I'm being paranoid, the builder didn't mention anything. The plaster will cover it all up anyway so it matters not.