It's about the ratio of the volume of the box compared to the size of the sound hole. Without knowing the volume can't tell if you moved a slight bit closer to the sweetest spot for that particular instrument ( to your ear) or a slight bit further away. But then all other factors will play into the equation, bracing, top thickness, strings, the players style etc. So basically what others have said, don't worry about it. You are likely close enough and may even have hit a sweeter spot.
Too small a sound hole and they tend to bark if played aggressively however if fingerpicking a smaller hole can sound really good at least to my power tool damaged ears. Too large a hole and they can sound thin.
