Koger interview questions

I was referred to the position by an employee of the company. The interview was one one one with a manager. The majority of the focus was on past sales experience and reasons for leaving my last company. At the end of the interview I was be asked to come back to meet with the COO of the company. However, I was sent an email two days later stating that I was over qualified for the position and that I would be bored with the role so they would actually not be bringing me back. When I asked why there was a change of opinion I never recieved a response. The people I met seemed nice enough however the end result seemed very unprofessional.