I don't think you're doing anything wrong at all. I have worked at city, county, and federal levels of government, and the process of application, review, and selection is never swift, never sure, and almost always protractive.
I have over 30 years in the training business, over 20 in technical training and over 10 in leadership of corporate training. I've applied for this job twice already this year. Realize that with the economy, budget cuts, hiring freezes, and a scrutiny constantly being placed on how the state spends money, a job with the State of North Carolina is very difficult to secure.
Government jobs are considered among the more "secure", and with nearly half a million more people just laid off last month alone, there's a glut of applicants out there, and some darned desperate applicants. It's just a tough time to find a job, and the Government is no different right now.
Try my motto: Never give up, never give in!