I like long layovers...call me a glutton for punishment or someone who just likes airports, but there it is. The last few itineraries I've purchased, both Y and J/F, have been changed automatically by what the AAgents call an automated sweep by their system which reassigns me to earlier flights with a more "suitable" connection time. This results in calls to AA to get back on my previous flight, and has resulted in me losing the seat I had chosen a few times (including exit row and my favorite row 3 on the MadDogs). Since the system is "automated," there's probably nothing to be done about it, but just in case...do any of you know of a way to "block" the reservation so that the automatic changes aren't made? The AAgents are always accommodating and friendly about it, but it does feel like a lot of needless work after I've put the effort into making sure I'm already on the flights I want to be on the first time around. Any thoughts would be appreciated.