This may already have been covered but I urgently need to ask it again and especially in light of the recent change with how you can claim miles at the 500 level:

About 10 days ago I claimed the 500 miles for my NWA flyer account. They were in fact immediately swept out of my emiles account, but since then they've never turned up in my NWA Worldperks...so they're in the middle of a pipeline somewhere.

Meanwhile, I asked emiles how to switch FF accounts for crediting because I wanted to switch to US Airways for future miles. They emailed back with the warning that anything "not credited" to your FF account already will be lost. So does that mean I actually have to wait all the weeks further for the 500 I claimed to actually turn up as credited in my NWA Worldperks or can I safely go ahead and cancel my emiles account and resign up again with US AIrways as my chosen FF account? This seems weasely worded to me on their behalf...but if I do the safe thing and wait for the 500 miles to turn up in the NWA account I'm also losing time and miles I could be earning in the existing emiles account. SO there's the dilemma.

If anyone knows from FIRST-HAND experience I would like your advice. Thx.