Both of you are right in regards to seating arraingments, but none of that is steadfast. I have recorded all kinds of seating arraingments for film scores, but they generally follow the seating plans you both list. Some large scale instruments are moved about(large bass drum may be centered in the back). I have seen setups which put all of the string instruments in the front around the conductor, most of the lower brass behind them, upper brass to the right or left, and all of the woodwinds on the left or right. It varies, and one has to consider whether this is going to be recorded(which may require some ajustments in seating depending on the music) or just a live concert which may use the standard setup. When it comes to seating arraingments, nothing is etched in stone. Brass, woodwind, and string esembles are another animal all together in terms of seating.