Alcoa Engineering interview questions

I applied for what I thought was an engineering internship interview on campus and submitted my resume through my campus's interview scheduling program. I was so excited when I found out that Alcoa had chosen me to interview and spent 3-4 days preparing for the interview (even missing work hours while at the interview). This would have been all fine had the interview actually been for the position I wanted, but midway through my introduction about my past research, the interviewer says that I'm not suited for the position and that I should apply for the engineering internship, as this interview was only for graduating business students to get a full time position in management. Somehow it not only slipped through the cracks to mention in the listing that this interview was NOT for engineering internships, but whoever screened resumes neglected to notice that I was neither a graduating senior nor a business student and therefore was not even qualified for the job they wanted. This whole experience leaves a bad taste in my mouth about Alcoa's hiring process and does not seem to bode well for other administrative issues.