AT&T interview questions

Applied online several times over the course of 3 months. Got a phone interview. During the phone interview he said he would pass my application to the location manager. Was set up with an interview with the location manager. The interview only lasted about 15 minutes. The manager did not go over all of the questions in his little packet before offering me the job. In subsequent interviews for different positions, the interviews lasted longer and were in more depth. I believe my initial interview process was abnormal.