Darden Server interview questions

I applied to my local Darden restaurant and marked down being interested in both a server and a host position on a Monday. That Friday, I received an email telling me that they were interested in interviewing me for a server position and I should call the restaurant over the next two days so we could set up an interview time. I spoke with the sales manager who then scheduled me to talk to her at 2PM the following Tuesday. I showed up 15 minutes early and everyone was super friendly. I talked to the sales manager and she was pretty impressed with me; I think it was because I showed a willingness to learn about the position and what I had to do, especially because I have no prior serving experience. The GM was there running an orientation and she left to see if I could talk to him right after finishing with her. He came over, asked me a few general questions, and then hired me right there on the spot.

Went in for the interview, confident, looking the part. I sit down fill out another work experience questionnaire and then meet with one of the managers. She was a bitter lady, dont think she liked her job. I got called the day before to come in and be interviewed to be a server which I applied for. We sit down and talk and she says the only thing they can offer is to be a busser. Why do you call me in to be a server and offer a busser. I spend 3 years in the military and just felt disrespected at this offer.