Michigan Production Machining interview questions

Filled out an application and received a call for an interview within a month. Went in for the interview was asked basic questions (i.e. "What are your strengths?" "What can you do for us?" ETC). Seemed like the interview was really just a formality. However, it seems that the HR personnel have no idea what the jobs they're hiring for actually are or do. I asked what the schedules were like and was told that machine operators were only working weekends about 40% of the time. They work 7 days a week.