Oh I see someone is speaking in riddles...
Let's see.... wha?
Sure. It was a light conjecture. It was unclear whether the seating section was somehow lower than the stairs. However, you are incorrect to even mention this as a problem since the subject was seated. The wall is high enough, that even if the subject had his arm resting on his head, it would still have to go through that wall. Point being: the bullet is not going over the wall to strike Gage. But we don't even need to be arguing this anymore since the official story is currently such that it is approaching Hankins from a forward position, whizzing past Ostergaard's neck (which he conveniently seems to have forgotten for the interview, even contradicting himself over it- mentioned earlier.)
There is no "problem with the argument". The argument itself is quite a valid concern to be raising. Your argument, however, is very much invalid. You see nothing and yet you say it is clear the shooter had plenty of positions to fire through only one wall. At the very least, he shoots through two unless he is nearly upon the adjoining wall.
Side by side of the 2 theaters made by mirroring their images:
http://postimg.org/image/6gcsbmscl/
The most obvious thing to notice is that the adjoining wall is "V-ing" out heavily. Simply put: you have to imagine folding those theaters together until those walls are parallel. You'll note a rough comparison to my model (walls are lower):
http://s18.postimg.org/iji3z73ew/sbscomp.jpg
looking directly within the wall:
http://s18.postimg.org/ttatu58g9/overhead.png
shoots through 3 walls near entry door (combating a previous poster):
http://s18.postimg.org/trvu3m0ax/overheadwire.png
If he ascends the stairs on the right (consistent with official):
http://s18.postimg.org/68k3i0b2h/ascendright.png
If he ascends stairs on left but crosses through middle:
http://postimg.org/image/4w2eg4dmt/
If he ascends stairs on left but goes in front:
http://s18.postimg.org/d0aikv021/crossesfront.png
That works, but then he is practically firing at the wall for some reason with all of his victims in the auditorium, and if you don't think he is shooting at the wall, we know Golditch was hit soon afterwards, and he was somewhere in the middle of the floor section, so we get something like this:
http://s18.postimg.org/6p5b4fytl/golditchshot.png
Which is honestly me going out of the way and thinking of the most generous seat I can place golditch in since he can be in any one of these:
http://s22.postimg.org/efk7tq9o1/golditchshot2.png
So rather than go with the numerous testimonies and descriptions suggesting explosives
"firecrackers, hiss, smoke, bang, boom, pop, flash, heat, shrapnel, set gas bombs as they were leaving, source of smoke, ringing ear, pepper bombs, explosion", you'd rather believe the shooter simply fired at the wall because he intended to. Because, basically, yeah, he isn't just firing at the wall and accidentally hitting these people without either going through multiple walls to do so, or practically neglecting his screaming crowd and firing a couple shots directly into the wall next to him. That's basically what this requires, and thus your apologetic argument loses weight especially in light of the contradictory witness testimony.
Just to display the absurdity of this, this is the most generous shot I can give for Hankins (which totally isn't, as you say, "many places in the theater"... I mean this is barely a believable shot, all other permutations are retarded):
http://s2.postimg.org/uo1yoije1/shotgage.png
And then you have the proceeding shot fired (necessarily
straight in order to hit a turned Golditch in the front left side of his neck who sitting in the middle of the theater):
http://s11.postimg.org/95054raeb/golditchshotwire.png
So....
pwnage