That's right. If Bruce McArthur had killed only one victim, he could have faced up to 40 years.
Again, what that case proved is that the judge used his discretion in the sentencing. Rather than going with eight consecutive multiple sentences, I believe he came up with 25 years as the parole ineligibility for those eight victims. Take into consideration the age of the murderer, Bruce McArthur. He was 66 years old at the time of sentencing.