I got a Flash stating:
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Air Canada announced today that effective Oct. 1, Tango’s fleet of A320 aircraft will be redeployed within Air Canada’s regular operations, and to Air Canada Jetz. Tango’s popular fares will be available on routes throughout Air Canada’s domestic network, and eventually for travel to all of the carrier’s U.S. and international destinations. Although Tango will no longer operate its own fleet of dedicated aircraft, the Tango brand will be far more widely available to customers throughout the Air Canada network.</font>
So to me it seems that the Tango brand is effectively dead, but well be seeing a new fare class called "Tango" throughout AC's worldwide network. Can't explain the flights above.