Originally Posted by eponymous_coward

I would suggest reading the last few pages of the thread, AS JL awards are difficult to book near the edge of the schedule at T-330, there are workarounds that are discussed by skimthetrees, you probably need to understand that or else you're going to be very frustrated with your booking attempts.

AS awards on JL are changeable online, though at some point if you do a huge number of changes + there are JL changes it will likely toast the booking record's ability to be displayed on the web and you'll need to call AS, so I don't think I'd just arbitrarily change the booking just because. Is there a reason you'd want to do a ton of changes to a booking?