Most garages standing in Crestline went up around 1956, which puts them square in the middle of this area's building boom. That era means narrow single-car openings, often 8 or 9 feet wide, hung on steel track that was bolted straight to wood jambs rather than the reinforced brackets you'd find on anything built later. The track brackets on these doors have had close to seventy years to work loose, and loose brackets are the number one reason a door jumps its track instead of riding smooth. Add a broken roller or a bent track rail, common once hardware this old starts to fatigue, and the door can walk sideways out of the channel on the very next open or close. This isn't a Crestline-specific defect so much as a Crestline-specific age problem: a town built in one tight window ages its garage doors in that same tight window, and a lot of them are hitting failure age at once.