In the film while fighting Natalie, Rose breaks her arm, and can't even get up to defend herself. When Dimitri comes down to save her she is able to pick herself off the floor and restrain Natalie to the prison door with leather. And in the next scene she is wearing a cast. She would not have been able to maneuver her arm the way she did in the previous scenes if it was injured.
Despite the statement by Rose that a dhamphir is supposed to keep their molijna marks exposed, Dimitri goes around most of the time with his hair down and his neck covered. In one of the gym scenes when his hair is up, there are no marks at all.