NASA Jet Propulsion Laboratory interview questions

Applied online, in a couple weeks received the standard no thank you email. Then a few weeks later, received a phone call from HR that showed interest in my experience and stated that she was surprised that I had not been considered for the position I applied for she would follow through and reconsider my interest in JPL. About five or six weeks later, another HR person called me and asked if I was available. Since I had just started a contracting position, I stated to her that I was interested in The position at JPL, and can be available for an interview the following week. Ended my phone conversation After a brief discussion about my salary and benefits details. Then in a couple days, received another no thank you email from HR, stating that they are pursuing other candidates. So, I don't know what to conclude, but, I certainly had the qualifications as stated in job requirements but never interviewed with any technical staff. Draw your own conclusions.