The Vitamin Shoppe interview questions

I filled out the initial application online after seeing they were hiring. I got an immediate call back from the manager to come in for an interview. Someone else who was interviewing was late so mine didn't actually start until 20 minutes later. Typical customer service questions were asked. I had a second interview over the phone with another manager who told me I would forward in the process and speak with the district manager. For some reason, that did not happen. Personally, I don't understand why 3 interviews are even necessary for a Sales Associate position.