Try checking your math a bit more carefully. 

Atlantic Canada is way over represented in the Senate. 

And Manitoba and Saskatchewan are also at their "floor" (i.e. Seats can't be reduced any more even though population-wise they ought to be).

And in the HOC, under the Harper Regime, Alberta was given extra seats and Ontario denied seats based on a population projection that assumed people would continue moving to Alberta. (Not sure if that assumption really holds water anymore)

But yeah, Ontario has 38.4% of the population (https://en.wikipedia.org/wiki/Population_of_Canada#/media/File:2011_Canada_Pop_Column.png). 

So it 'must' be over represented. (24/105 = 22.8% - https://en.wikipedia.org/wiki/Senate_of_Canada)