The only real issues with overfilling are oil foaming and oil overheating. If the oil level is high enough that the crankshaft is running in the oil, it will tend to whip the oil into foam, which lacks lubricative ability, and overheat it, due to the additional drag on the crank. Kinda doubt the slight overfill would generate either of these problems. Severe oil overfill may also splash excess oil on the cylinder walls, increasing oil burn, but that tends to be self-limiting (other than perhaps fouling the plugs, if long term). So no need to worry.