Stamps.com interview questions

Filled out an application online, then 5 days later, got a call from a department hiring manager wanting to interview me the next day. Did the interview in person in El Segundo, and the day after got a call offering me the position. From there, it took 4 days for HR to send the emails with the compensation package, information on benefits, and forms to fill out online.

The interview process was a bit unprofessional and unconventional. The guy who interviewed did not have a list of questions to ask me. Instead, he was asking questions from the top of his head. He read my resume and instantly asked me about my educational experience since I have an advanced degree. I was asked about my professional experience as it relates to the position. I was very qualified for the position. I was not offered the position because he felt, or the company felt that there are more qualified applicants. I have over 4 years of customer service, call center experience. How could I not be qualified for the position? However, I felt that I was not selected because I have 2 degrees.