Yup. That's what they're doing -- screwing around with the flights (and passengers) trying to figure out whether to cancel the AC flight or the CP flight. Here's the details from Travelocity:
Saturday, Feb. 26
Option 1 AC.123 767 YYZ-YEG 8:45am **UNCONFIRMED**
Option 2 AC3951 737 YYZ-YEG 8:45am **UNCONFIRMED**
Option 3 CP.951 737 YYZ-YEG 8:45am **SOLD OUT**
Yet another reason to start flying AA through the US.