Usually just the drive through is open late
An emergency, a holiday, something was not right. Maybe a different area with different hours. Maybe call that location and ask the manager.
It might have been that the drive through was only open, I've seen that happen at a few places.
Holiday maybe? If not you should call the stores directly and ask to speak with a manager to see. I generally go around that time as well and have never experienced that. Maybe telling someone could change things.
Was it Christmas or New Year's day?
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