So recently I've successfully booked a Oneworld Global Explorer award using AA miles. I'll be doing most of the traveling in the next couple months, but I want to use the last two segments (flights 15 and 16) for a New Year's trip. The dates I want (late December) were not open when I was booking the whole award ticket, so I just chose two random dates in November so I could get the RTW itinerary approved and ticketed. However, once the seats become available, I'd like to change the dates on those last 2 segments. The only problem is, once the date for flight 15 becomes available, it will still be another week before the date for flight 16 shows up online... and I cannot change the date for flight 15 alone because it would make flight 16 come before flight 15, thus creating a change of routing. Any suggestions?