If you read my reply you would have figured out that a full field background is NOT necessarily completed prior to your polygraph. I will tell you that most in the process, particularly those with multiple prior addresses, two or more, are scheduled based on a NAC / National Agency Check and fingerprint card. It is YOU that assume too much grasshopper. You cited part of the hiring manual and took to your tunnel vision mind false assumptions about where you were in the process. I bet if you read that tenative offer letter you will find that your name was filled in at the top and that it was otherwise generic past the first paragraph. Don't you know that all such correspondence is reviewed prior to being send out ? Did you think you were getting a personalized letter ? Grow up, your sense of self importance is too high here. Perhaps that showed in your psyche too.
By the way, as with the military and other U.S. Government agencies; the needs of the (Fill in the Blank) come before anything in the manual you were given under long standing directives, and you will not be able to suck off that technical tit from your wining about it.
If you were really as analytical here as you say, then you would have figured out that the NAS report you love to wave about (like the book of Mao) is not in fact a peer review study, as the very scientists who put their name on it are in many, if not most, cases dependant on a security clearance for their jobs, and are subject to these polygraph tests. Ofcourse they don't like to admit that, but you need only look at their resumes to see where they have worked, and you will find your answer. The simple truth is that they think they are above it all due to their PhD's like George M. In reality, this country has been betrayed many times by people of such high education. One thing for sure, Men as good as you, if not better, as using the best tools they have for the job. That you do, or do not, like those tools, or the NAS taking the same (in their case biased) opinion, does NOT equate to peer review research on yours or their part. If you have a better process, then invent it, sell it, and be a government contractor. However, attitude is everything, and yours thus far, has not taken you where you artificially feel you are entitled to be.
May I recommend in your case a Tony Robbins course, or at least a book by Peale about the power of positive thinking. You really are a downer and even women have radar for that, so don't let this leave you jobless and alone on Saturday nights. Get positive, and re-engineer your way toward a job as good, or better----- and perhaps in a technical area. You came here looking for a shortcut, found a group of similarly disgruntled people, and you have no more clout than a bunch of wino's bitching about the world. I don't know if as a Parent I could even let my child play the blues all day long as you have holistically done here. Keep Polishing, you'll get there !