As HKK stated, the lack of scenarios 1 and 2, along with the absence of the instructions box at the beginning is supposed to happen. The interesting little bug you encountered on level four, however, is not supposed to happen.
It appears that the level is attempting to finish when all of the enemies are defeated. However, Dark Matter Mode sets the level completion condition to "Capture All Asteroids". I think this conflict is what is causing the error.