The Home Depot interview questions

I read about the job posting on snagajob and completed an online application which included a skills/aptitude test. I received a call to schedule a phone screen, followed by the phone screen itself. I was then scheduled for an interview for a full-time position. At the interview it was communicated that they already had someone in mind for that position but asked me to come back for an interview for a second position. At that interview I was given the same information and asked if I was open to a third position. It was indicated that if they called me back it would be for an equal or better position. The third time I was called in, it was for a part-time service desk position which paid minimum wage to 8.00/hr. I was kept waiting 45 minutes for the third interview. I began to wonder if I was just on an approved interview list and I was being called in to complete a quota of interviews for positions they had already selected.