J.P. Morgan Quantitative Research Associate interview questions

This is an internship interview. I took two round phone interview. Both round interviews focused on my resume and then asked some technical questions. In the second round, the interview schedule was very confusion. On Thursday morning, I received two phone calls from JP Morgan which told me that they would interview me for the second round. I thought I need to be interviewed by two people. I had one in that afternoon with the first guy, and scheduled another one on next Monday with the second guy. On Monday, I did not receive a call on time, so I called the second guy. He told me that I had finished the second round, and he did not need to interview me. They were very unprofessional for my interview. Firstly, they did not make a proper arrangement who will interview me. Secondly, they did not tell me the second interview was canceled.