Actually, what they do say is that administrative mistakes are not a reason to deny someone the right to vote. They say that it cannot be a perfect system and that small errors like record-keeping errors, such as in the vouching and registration certificates, are not reason enough to deny someone the right to vote. That was the majority holding, which is why the member for Etobicoke Centre kept his seat.
On March 31st, 2014. See this statement in context.