If you don't like the dual shock option don't get it. The dual shock system is a custom job and not needed to run the kit. Looking at it, the dual shock mount is the same one that would be used if you wanted to convert to a coilover. So, maybe you can't afford coilovers at the moment, so you run dual shocks w/ tbars till you can afford the coilovers. Both shocks obviously won't fit in the stock position so behind the arms makes sense (if you had one in the middle of the arm and one outside, they would have to be different lenght shocks, so the duals behind the arm makes it simpler to have the same size shocks). Also, I'm sure it's been cycled plenty of times to insure that it doesn't hit that front shock. From the pic, it doesn't look like it would hit it.
That idler arm brace looks better than some other DIY jobs I've seen and you can't blame the guy for trying to come up with other ways to make stuff. I could care less if he's mispelling stuff at this point as he's doing it all himself and trying to make it affordable. If he pays someone to proofread and do his website/take pics for him, then the price goes up. I learned a long time ago, spelling doesn't neccesarily mean much when it comes to how talented someone is with their hands.
I can tell you from looking at it and holding it in my hands, it comes across much better than what the pictures show (he also doesn't want to show too detailed of pics because someone might start trying to make the same thing). Also, you have to remember that the lower arm should take the brunt of most impacts as the lower arm is what hits the compression bumpstop. That's why most kits have a tube upper arm and not boxed, it doesn't have to be as strong as the lower arm. After seeing the kit, I'm pretty sure you'll start breaking steering and torsion bar stuff prior to anything with the upper arm.