Your OH1 is left behind and your OH2 is straight behind. The rear OH2 is pictured as a individual on the front line in the 6th diagram. OH1 at LB is the back row OH2, I suppose you imply. I believe that your OH2 and OH1 have mixed up in diagram 6.
It needs that you have two excellent setters on your squad that are both capable of defending, excellent servers and excellent setters. You will go through replacements much more quickly, because you have to put the correct hand side to the settings and then the correct one.