I booked a Avianca cash fare via Booking on mixed itinerary, logged into manage my booking with Avianca and there is no way to add an Aeroplan number to the booking. Every other Star Alliance carrier was on the list except for Air Canada. Is that normal? If anyone else has an Avianca booking can you check this too. I am curious if it's just me or if it's because it's a mixed Avianca / Air Canada booking.