Most of the housing stock in this service area went up between 1970 and 2003, with the median build year sitting around 1982. That means a lot of the original galvanized track and roller hardware from those builds is still hanging in the garage, thirty to fifty years old, never replaced. Steel track that old develops shallow bends you can't always see from the floor - a bump from a car bumper, a kid's bike, or just decades of the door riding slightly misaligned, and the rollers start climbing the flange instead of sitting inside it. Add in the mild temperate climate out here: no deep freeze, no heavy snow load, so track doesn't get the kind of seasonal stress cycling you'd see in a harsher climate. That sounds like a good thing, and mostly it is, but it also means a lot of these doors never got inspected or serviced on a storm-driven schedule. The hardware ages quietly instead of failing loud, so by the time a door jumps track, the rollers are usually dry, the track bolts have backed out at the wall brackets, and nobody noticed until the door wouldn't close. Across the 1980s-90s stock that makes up most of this area's roughly 25,689 owner-occupied houses, this is the single most common track-related call we get.