This has been annoying. My wife and I went on April 24th to apply. I was interviewed first, then her.
She received her KTN within 24 hours. Me? It's May 3rd, I'll be flying fairly soon, and mine still says "APPLICATION PROCESSING
Your application has been received and your security threat assessment (STA) is underway."
What gives? I have no "record," and we were there at the EXACT SAME TIME.