Five Guys Cashier/Crew Member interview questions

The manager called me at around 2:30PM saying he wanted to schedule an interview three days from the day; Friday. I accepted, and showed up 10 minutes early on Friday. The Interview lasted maybe five minutes, and ended on the exact time the interview was scheduled. The questions were all capability questions like "can you lift 30-50lbs" and "can you interact well with others". I thought I did great, and he told me he'd call me on monday. He didn't, so I called, and said he has a second interview to schedule with me on Friday. I said OK. Friday came, and he called me saying the GM was unavaliable so he;d have to reschedule to next tuesday. I said OK again, but on Saturday, he called canceling that second interview and basically saying No you can't work here. I have no idea what I did wrong.

I went in for the interview, and was already on the schedule for the following week because they were very short-staffed.