IMO, you are on to an important thread here. The opacity of classification issues to otherwise informed observers is a problem. At best it unintentionally contributes to UAP obfuscation. At worst, it can assist certain elements in hijacking the classification system.
Re: your point '(a previous example is the notion that certain Congress people have the proper clearance to access classified information others don't—it just wasn't true).' I was unaware of a definitive answer. Can you point in the direction of an authoritative link? Thanks!