My guess is you had less fuel than you thought or the tank may be a little larger than spec.
I don’t recommend topping off the tank. Look around the glove box and the lid or area under the lid at the fueling point. There is likely a warning not to top off the tank. penny saved might cost you dollars in repairs. Likely it will worn you NOT TO TOP OFF THE TANK. You can damage the vapor recovery system and then it may become very slow filling at any station.