OP, kudos on the fat loss, that's some impressive work for three months time. Not to pile on, but the program that was written for you looks like a good next step. Like was said above, you've done nothing wrong, in fact you've done a lot of things right for what your goal was.
The thing is, we have to make adjustments periodically to continue making progress. That doesn't mean change programs every three weeks, it just means to look at where you are and where you want to go and formulate a plan to get there - and then stick with it long enough to see what happens.
I started out similar to you years ago - I was weak, but I was skinny. I lifted for 3+ years, spinning my wheels and not eating enough to gain any weight because I believed what was in the muscle mags and didn't want to get 'too big'. When I finally bit the bullet and changed my diet, I gained 20 pounds of mostly muscle in 4 months time.
Point being, you've got some experienced guys giving you a good plan for your next step based off of your request for help. Guys are trying to give you help, but instead you are trying to get someone to tell you what you wanted to do anyway. Personally, I would go with either plan - the first one written for you above, or 531 with some of the add-ons Wendler recommends. But regarding your obsession with volume, remember what one of the guys said above - quality is better than quantity. Build strength, quality muscle will follow.