They elect not to make an offer because I would be too good for the job.
Amazing that they could say that with a straight face. More amazing is that you actually believed them.
I know I am feeding the AC TROLL, but this does happen. It happened to me about a year ago.
I applied for a position with a company that had two offices, one in Atlanta near my house and the other in Warner Robbins, GA, about 3 hours away.
After the interview even I realized that it was not the job for me. They really needed a mid-level developer, not a senior developer such as myself. However, you should always remain professional... Even though it felt like time was wasted you never know what can happen next. I thanked them for their time, exchanged pleasantries, and then returned home.
About a half hour after I left, the project manager I met called me... I really impressed their team. They were telling me that they wanted me on the team and were going to talk to their client and possibly renegotiate their contract in order to redefine the role a Sr Developer with the proper payscale. They just needed to talk to the CEO in order for him to approve the major change.
It turns out that the CEO did not want to renegotiate with the client so that job opportunity was gone. However, he was about to start a brand new pet project of his own and a week later interviewed me personally for the new position. Ultimately, it did not work out, the new position was for me to lead a new team. I have the experience for that and would have been brought on, but, as a team lead I would have been expected to be onsite. As the CEO's pet project, he wanted it at his location 3 hours from my house. I turned it down because I was not willing to relocate, and we both knew that a 3 hour commute (each way) would not last very long before burnout sets in.
Moral of the story:
1) Yes, you can be overqualified
2) You should still be respectful of others even when it seems like your time was wasted... (It is never wasted when you leave a good impression.)
3) An AC TROLL will never learn 1 & 2 because neither will ever happen to him/her/it.
4) It obvious that the TROLLS are still unemployed due to the amount of time that have on their hands.