Thanks for the fast reply! I think that's exactly how it happened. I looked at the confirmation emails and there are two charges on the credit card, one is $100 less, so I'm assuming the original $100 credit was applied to just the one flyer. Thanks again...

I was reading through other posts and was wondering about this situation as well. What about if I had say $20 in TTF that expired in Dec 1st 09 and I booked a $400 flight for mid November 09 using the $20 TTF and the rest on a CC. If I then had to cancel the flight entirely, would the entire $400 expire on Dec 1 2009? Or would it only be "up to" the original TTF amount of $20 with the rest expiring 1 yr from the booking date? Is the expiry date treated the same way if the price had dropped to $300 and I still took the trip ($20 on Dec 1st, $80 a year from booking)? Would it matter if the flight was for one or more flyers? Ok, I'm done...:-P