Perhaps LAN knows you're a Camporista and is retaliating against you for the hangar problems you've caused them at Aeroparque.
I almost always fly LAN to Santiago and Buenos Aires, and have never had a problem with them. They keep their schedules, and their cabin service is impeccable. I've never flown a LAN domestic flight in Argentina, but I've done so often in Chile with no glitches whatsoever.