Louis Dreyfus Company interview questions

There is a prescreen, then an interview with a jr trader and another dept and then if those 2 people both say yes you move on there is a 3rd round interview with an exec. It was very unprofessional and disappointing. The HR person sent me another candidates information making me think I had an interview when I didn't, was not good at responding to emails. It also took over 3 weeks to set up the initial interview and the HR rep continuously proposed the one time I was not available due to class. The HR person also arranged for me to have an interview and then didn't sent me a link and when I tried to contact them for the link I didn't hear back until way after the interview time was set in which they rescheduled and I was disappointed in the professionalism of the interviewer.