Well, it finally works!!!!!!!!!!!!!!!!!
For those who pass this way with the same problem, here's what it took:
Call these guys:
Sky Milenio La Tele de México
They sell Sky equipment legitimately in the US. The guys there are great and now the technology incredibly well. Very helpful.
They set me up with two new receivers both of which show Q around 40. They explained to me two things that were the likely cause of my trouble:
#1) The Sky+ receivers are crap (which I'd kind of concluded on my own). Apparently Sky is actually suing the manufacture and has discontinued them.
#2) Sky Mexico has taken some very strong precautions to prevent people from 'splitting up' their receivers (giving one to the neighbor and paying less on one account). If the initial install is with two receivers, then you have to have both receivers connected to a switch that they provide which allows the two receivers to also communicate with each other. I never saw such a switch when we brought the receivers up to the US (it may have been installed but we didn't take it with us).
When the first Sky receiver came from Sky Milenio, we plugged it in and it worked instantly. Nothing else needed to be changed. We then bought a second one and they activated. Immediately after they activated it, the first receiver started glitching every 7 seconds (apparently trying to find the other receiver).
Once we received and plugged in the second receiver through the provided switch, both worked perfectly.
While I'm not sure we needed the 6' Fortec Dish and high end Invacom LNB, both definitely have helped and we're going to stick with them. After 8 months fighting with this, I'm going to leave it exactly the way it is.
Thanks for everyone's help!!!!!!!!!!!!