CP has a habit of not including changes to small packet pricing in their updates. Last year when they increased the small packet prices, they also left it out of the update also. CP groups small packets with lettermail (don't ask me why - I shake my head too), so whenever a price increase goes into effect for US lettermail, you can be assured small packets will go up too.
I called CP today to confirm this, so the info is coming from a CP rep. The prices above were what was quoted to me for Jan 17th. Last year when they increased the small packet prices, they also left it out of the update. You can call their general customer service 1-800 number to get this info but you won't find it on their website. I didn't check the increases for international small packets, but seeing as international lettermail is going up, you can bank on it. If anyone checks the international rates, please post.
Lincoln