Houses in this part of the service area were mostly built between 1964 and 2003, with the typical Damascus home going up around 1978. That generation of garage door came with lighter-gauge steel track and rollers sized for a lighter door than what's often on the opening now, especially after an owner swaps in an insulated replacement door without upgrading the hardware underneath it. The extra weight on an old track is a common reason the door walks off the rail over time instead of all at once. You'll usually see it start small: a roller riding the edge of the track, a faint scrape on the open or close, then one day the door binds or drops crooked. By the time it's visibly off the track, something upstream - a cable, a hinge, a bent rail - already gave out.