Wouldn't the 7th on TOC be considered offset?
Incidentally, does anyone know the origins of the crossover holes on TOC, 7 and 11? i.e. once the holes evolved to having 18 separate holes, the logical flow of the other holes 2-6 and 12-16 is to the right side going out and right side coming in. Are these and the 17th the true "designed" holes on TOC, and is it a coincidence that they are offset?