Netflix Software Developer interview questions

I applied for the role online as I figured I've got a good background for it. Indeed, I got an email from a recruiter who called me afterwards and set me up with a phone screen. Both phone screens were very pleasant and professional. I was asked a lot of questions about my background and some general multimedia programming related questions which were fair all in all. After a few days I was asked to build a small framework which can show my coding skills and understanding of the subject. The suggested deadline was 6 days afterwards. I was happy to take the project however due to a stressful project I had at my job I asked for an extension. To which I was answered: "Ok, but please take into account that we're interviewing other candidates at the same time and we might progress with them". I gave it my best efforts and put anywhere from 15-20 hours into building and testing my solution and was able to submit it one day before the suggested deadline. According to my understanding the hiring manager was happy with my implementation as a recruiter called me in order to coordinate an in person interview day and schedule flights and accommodation for the trip. Needless to say I was happy when I received the suggested itinerary. However, 10 minutes after receiving the email I received a phone call from the recruiter who told me that while the team would be happy to meet me, they are already in advanced stages with an another candidate so it wouldn't be a good use of my time to make the trip. I just felt rather uneasy since I totally played by Netflix's rules and despite that I feel like I wasn't given a fair chance eventually. I feel that the hiring process was unprofessional and unethical in my case.