Discover interview questions

I cleared the technical round with good merit and went to on site for final round. One of the interviewer in the panel was not even listening to my words and asked irrelevant question. Later he was corrected by other panel member. After a week recruiter called me and said I cleared the round but one of the manger from the discover wants to talk to me, I said yes, manger gave a call to me and he was speaking as if he's in hurry. He said the panel has forwarded your application to me and they you are interested in taking a developing position, but right now I don't have any developer positions available in my team, I can offer you a production support. I said I'm ok with the offer. Next day the recruiter sent an email saying that they were not interested in offering a position. I called the recruiter and asked the reason, he didn't gave any explanation. I totally don't understand, why the panel forwarded my application to the wrong manager who don't have any vacant positions. If that manager don't have any positions with him then why did he accepted the forwarded application from the panel. Why does the so called experienced person in the interview panel was not paying attention to what I'm saying? After this incident I strongly felt their interview process sucks in evaluating good candidates.

First step was a phone interview with the hiring manager and had a high-level discussion. Next step was an in-person interview with the team and hiring manager with each member allocated 30-45 minutes