Yahoo Intern Human Resources interview questions

I applied via online application and received an invitation to a phone interview after about 2 weeks. The interview was quite ok, the questions easy with no typical right-or-wrong answers. The interviewer seemed totally impressed by my CV and my previous work experience and told me she definitely wants to do the second interview with me. I was positively surprised and we agreed that I will come back to her because I had to talk to my University Director first about the internship conditions. After writing an Email to my interviewer confirming my interest in the internhsip and stating that everything is fine with my Director I received a standardized rejection mail! I was confused and forwarded the Email to my interviewers Email adress asking what happened and why she did not want to continue the process like said in the first interview. When I did not get a reply after 4 weeks I forwarded the Mail to another employee I was in contact with before and asked what happened to my application. This was two weeks ago and still no reply... This is not only frustrating but also very unprofessional!! I worked in HR and I also had to tell applicants that they will not get an offer but simply ignoring their questions and make promises you cannot keep is very disrespectful.