Creditting your AA flights to your AA FF shouldn't be a problem. I know there are new rules though for non-AA flights as part of the challenge, I think in effect since January (anyone confirm or deny?)
Nope. Note that the flights on the AA metal are on a non-earning QF codeshare...thus it earns according to the QF rules for AA, which means that (according to the OP- I haven't checked myself) 'N' is not eligible.
Cheers.