I have 2 unrelated questions:

1-How can I figure out when I am at risk for losing miles? I fly on USAir primarily so I never seem to lose those-I also have United, AA, National, SW, Hilton, Marriott and Starwood?

2- My daughter will be taking a student trip to Australia and New Zealand this summer. Flying there, she will take AA from the East Coast to LA and then Quantas to and from Australia (as well as internal flights). Coming home, once she gets to LA she will fly USAir to the East Coast. I know miles are not transferable. However, I was told that she can have the Quantas miles credited to USair or AA. So far, she has about 2700 miles on USAir and none on AA. Logic would tell me that she should get her Quantas miles linked to USAir, particularly since my husband and I have enough USAir miles for free tix (I have limited AA miles-my husband has none) Am I missing something?