UPS Part Time Package Handler interview questions

So I filled out the application for the 6-10:30 shift and put my availability as well as school hours. On Tuesdays I have class from 5-8:30 and got approved for the interview! So basically, I could work any day for that shift except Tuesdays. It was nice to see that the company helps with tuition and is student friendly. The interview was for 7:30 AM so I got there a little early. At 7:15, I walked into the guard office and said I was there for the interview. The guard told me to come back 5 minutes before the interview, so I did to no prevail. She told me to wait until other people showed up, so another 15 minutes later, we began to walk into the warehouse. The second we walk in, a worker goes up to the HR representative and firmly tells her that workers need to wear gloves, because he's sick of employees hurting there hands and she shrugged it off. So I began to wonder if maybe this interview wasn't as I had thought. Us three applicants walk into a room and the interviewer said,"so everyone is here for the 4 to 9 AM shift?" I told her I was for the 6-10:30 PM and she questioned why I was even at the interview. I told her I had school that day, so I wasn't able to go at that time. Why I was even questioned why I was at the interview when that time was presented to me confused me. She called the 6-10:30 supervisor to tell him that I couldn't work that one day, or would have to do another shift, either midnight to 4 AM or 4-9 AM. He started yelling,"NO. NO" and some other mumbo jumbo that I couldn't hear, as we were all sitting at the other end of the table, practically across the room. She said they don't really even need a 6-10, so why the application was available in the first place boggled me even more. So she told me I could leave or consider working one of the other two shifts, as long as my schedule as a student didn't interfere with them. So at that point, I decided to leave the interview. How a company that is supposedly student friendly could have "higher-ups" so rude and not flexible leaves me in awe. I have never had an interview experience like that.