Columbia University Web Developer interview questions

After a 5 hour interview it seemed like everything went well and they even went on to ask me about salary requirements and starting dates. Following the interview, about 2 days later, they sent me an email asking about 7 different managerial level questions completely unrelated to the position they were offering. In the email, they mentioned that they are still in the interviewing-process and that they will get back to me about my candidature within 3 business days. A week later, after no response, I was forced to reach-out myself and ask them about updates after which they notified me about that the fact that they have found a better suiting candidate. Overall experience: Extremely unprofessional and a complete waste of time and anticipation.