Asking for help: I encountered a serious problem in enrollment

Firstly, I applied for Milan University this year. The IMS ranking list has just been published in October 10th and I found I was admitted. However, when I tried to enroll as instructed, the website told me that I did not apply for admission. (I’m sure I typed the right tax code.)

Additionally, the IMS ranking list says that candidates should proceed with the enrollment starting from October 17th. But the Call For Application indicates that I should finish the enrollment before October 15th. I am really confused by this contradiction.