I got to an OCI interview about 5 minutes early, and heard them talking with the prior interviewee. The sign on the door says "knock 5 minutes before your scheduled time" but I would always knock right at my scheduled time. No point in annoying them 5 minutes early. So I knocked at my time and they just kept going. 10 minutes later I knock again... no response. 10 minutes more I knock again. It's now the middle of my interview slot, and I'm starting to get annoyed. I didn't have an interview right after, but I had somewhere to be after the interview. Finally, 30 minutes after my 20 minute slot started (35 after I got there), I knock one final time before I was going to go to the career office and complain. I heard a "that's sooo rude" from the interview room, to which I thought "the rude thing is blowing through my entire interview slot and ignoring my knocks."
Finally, the interview ended, and I got gruffly invited in. They were obviously annoyed with me. I introduced myself and told them that I was the 3:00 interview. Anyway, after a minute we realized that the career office had screwed up and double booked my time, but forgot to inform me that they pushed my interview one slot forward to fix it.
You'd think that this would be the end, but it wasn't. Once the mistake was exposed, they instantly became gracious, only to have it turn back to gruffness when they looked at my resume. My experience is specialized into a certain type of law, and after the first "talk us through your resume" question they say "you know that this is an interview for [certain city] office, and the only office that does [specialization] is in [other city], right?" I tried to salvage the interview, but I knew it was over at that point, and the 20 minute interview ended in 5 minutes. I left the room wondering why they selected me to interview in the first place. Why did they waste my time when they could see full well from a cursory glance at my credentials that I was specialized in a field that they didn't practice??
At least the terrible feeling didn't last long, I got 2 CBs on the drive home.