DuPont Field Engineer interview questions

Contacted by HR for initial screening, 3 months later I was contacted again for an onsite interview. Flew down to find out the actual interviewer was not going to be attending the interview. There were two 1 hour interviews followed by an hour tour. Got asked questions about previous experiences and then some feedback about things an intern would never encounter. Radio silence for approximately 2 months after the interview, only to finally be contacted by HR with what seemed like another interview, then ultimately denied. Overall, this location will not value your time or even have the decency to respond after a 3 day trip to interview with them. The whole process was super unorganized and unprofessional.