Sears Backroom Associate/Cashier interview questions

went in for an interview. interview basically consisted of them informing me of how things ran around there. she asked what my asking pay was, I said I was open to negotiating. then asked what I made at last job, and I told her, which is a bit high for a retail clothing store. she said she would put in a request for an hourly pay less than what I'm used to making. then I was told they will send me an email with an offer than I can say yes or no to. the next day I get a call from her, she basically told me to change the position that I'm applying for, because I originally was applying for stock associate and she convinced me to go for cashier. that way they can send me the offer. I changed it, even though I had to take another assessment. then about 20 minutes later I get an email saying I didn't get the job. what a complete waste of time. I canceled an interview because I was under the assumption that I would get an offer sent.