If a background check determines that a candidate is non-competitive, the district can't hire that candidate. The risks to the district are too great. I don't think it's fair to suggest that the district did this just to be a bunch of jackasses or something. I suspect that there is something negative appearing on the background check. It could be an error, something very old, or something about a different person with the same name. In any event, it is probably worth it to obtain a background check on yourself and find out what's on it so that you can get the issue resolved.