Most garage doors in Corinth went up around 1997, right in the middle of the broader 1973-2015 building window for this part of the service area. That means you're mostly looking at steel sectional doors, either single 16-foot double-car doors or a pair of 8- or 9-foot singles, hung on galvanized steel track with roller brackets bolted straight to the jamb. That hardware is now approaching thirty years old, and steel track doesn't fail all at once - it walks. Screws back out of the wood jamb a sixteenth of an inch at a time, brackets rotate a degree or two, and the door starts riding slightly off true. In a moderate-heat climate band like this one, you don't get the extreme freeze-thaw cycling that snaps brackets outright, but you do get enough seasonal expansion and contraction in the track rail to loosen fasteners that were only ever finger-tight from the original install. By year twenty-five or so, that slow drift is enough to pop a roller clean out of the track on a door that's been running fine for two decades.