Thanks for the warning. After reading this I checked my four e-tineraries and saw that notice in red saying that I should call to confirm the three flights LAX-SFO-SGN-SFO. The seat assignments for those flights were gone but I still had F for SFO-LAX. I called the number and dealt with the computer-man (the "got it" guy) who gave me seats for the first three legs but took away the last one. Called the 1K desk and got row 15 windows for the 744 flights, much better than I originally had and a seat in F for LAX-SFO. Waitlisted for the last leg. This res was made May 31 for Nov 4-14 travel.

Thanks again.