Only-childs are probably going to feel indifferent here, but I think all siblings got the wrong laundry from their parents at some point. There was a period of like 4-5 years where my mother would always give my brother my shirt and me his shirt. It'd have our school on the design, but she'd always get it mixed up. We never really had many mixups except that. It used to drive me crazy on how she could not stop giving us the wrong thing.
Did you ever get the wrong clothes?