CSL Customer Account Analyst - Contractor interview questions

Was to be a group interview with supervisor and department manager. Department manager ended up going home early for the day and only supervisor was present. No one came down to lobby to greet/escort me up to the company offices. Was told by the guard I could just go up after she was unable to find my name on the daily visitor's list. After finding the offices, where there was no receptionist at the front desk, I located the conference room the supervisor was just sitting in, waiting. I walked in/introduced myself and the interview began. After this unprofessional start on their part, the interview seemingly went well. The 45 minute interview ran over about 10 minutes which I took as a good sign because the person was very thorough in asking about my related experiences, my technical abilities and describing the work environment and duties of the role. I thought I had a great chance at it. Was told later by the recruiter that the interviewer felt I was over qualified for the position.