Oracle Project Manager interview questions

I had a phone screen with a recruiter back East followed by a follow-up call with the hiring manager. Nothing difficult just wanted to know about prior projects and what I was looking for. Conversation went well and after a few weeks of trying to lock something down I was invited on campus for an interview. I met with two different people and the interview process only took about one hour. I sent a thank you email after the interview and was told thank you and that they would be in touch shortly. I have sent two other follow-up emails and have not received any response. It has been about a month now. I assume they are interviewing other candidates and have probably moved on but this lacks courtesy and professionalism.

Weeks after internal referral before talking to hiring manager. another 4 months before they "re-open" the headcount and want to discuss again. The week I decided to take other opportunity, I no less than ten job site spams. what a co-incident.