Auto driver reminded me I've already paid and stopped me from paying him twice

So on the ride, he stopped at a CNG pump to fuel up equivalent to the fare, and asked me to pay for it. I didn't mind, wasn't the first time this happened anyways so I did. Once I got home, I mindlessly started scanning his payment QR when be asked me to stop, and reminded me that I already did. I know it isn't much, I wouldn't even have ever realised that I paid him twice. But I thought I should share this here, since it could be a fresh change of pace from all the other incidents we read about.