Here's one that I really don't know...

What if a flight is on AC flight number and AC booking class, say, V, would M&M credit it as an AC flight or as a LH flight. I don't know what the booking class would be if it is under LH's flight number.

The fares would be different. I don't know what to credit the AC flight under to get maximum miles - BD, AC or LH.

Thx