Last week, I flew AC542 SEA-YYZ. The flight was booked on UA part of the codeshare. My return flight was via Vancouver. I booked on Expedia.

Looked at my AP online today. You would think that I would get 2,054 miles for SEA-YYZ as it was booked on UA.

My statement says:
23-JANUARY-2005 2005 ELITE FLIGHT BONUS 513
21-JANUARY-2005 AIR CANADA - TANGO FARES SEATTLE/TACOMA TORONTO 1,027

I was unaware that there was any United fare out there that credits only 50% miles or that booking on United gives a tango fare.

Guess I deserve that for saving $30 - should've paid the $30 and flown AC all of the way!

Anyway, I'll write Aeroplan and ask them to correct.