The Delvac 1 did, at least until recently, or the new sheet is a disaster. In any event, yes, it's strange up here. All of Imperial Oil's synthetic HDEOs are at fire sale prices all the time, at least at my distributor. Delvac 1 LE 5w30 is actually even cheaper still, which is totally bizarre.
All it really illustrates, though, is that Canadian retailers think that a markup on oil of over 100% is acceptable. There was another thread here about oil markups in the retail industry. Up here, parts stores generally have a 15% to 20% markup on oil. Walmart and Canadian Tire are so bad, if you have to buy oil at a regular price, you're far better off going to an independent parts shop.