Complex sentence: Barton J noted that there was no error affecting the seats of Senator Sir Josiah Symon and Senator Russell, these errors by Returning Officers were proven to have affected the outcome of the election for the third seat.
Split into simpler sentences: Barton J noted that there was no errors that would have been sufficient to affect the seats of Senator Sir Josiah Symon and Senator Russell. The identified errors by Returning Officers did however affected the outcome of the election for the third seat.