Phone interview first, then onsite interview, during the onsite interview, you have to prepare 30mins personal presentation. Then, Technical Question from all the team member

I applied on line for this position. Few days, I received a call from the hiring manager (during the day) asking a some technical questions. I manage to clear this unscheduled phone interview (This was highly unusual since I was never notified) and was received a request for an in-person interview. From the beginning, this was very disorganized. I was interviewed with eight different and got rejected few days later.